Common Toyota Highlander Hybrid Problems and Their Fixes

The Toyota Highlander is one of the most reliable SUV vehicles that money can buy. Factor in the additional trims of the hybrid version, and you have a winner. However, they are also bound to

Keep reading to learn more about Toyota highlander hybrids, their problems, and how to fix them.

What are the best years for the Toyota Highlander hybrid?

• 2007 Highlander Hybrid
• 2009 Highlander Hybrid
• 2010 Highlander Hybrid
• 2011 Highlander Hybrid
• 2012 Highlander Hybrid
• 2013 Highlander Hybrid
• 2014 Highlander Hybrid
• 2015 Highlander Hybrid
• 2016 Highlander Hybrid
• 2017 Highlander Hybrid
• 2018 Highlander Hybrid
• 2019 Highlander Hybrid
• 2020 Highlander Hybrid

Toyota Highlander Hybrid Years to Avoid

In the Highlander Hybrid’s already lengthy run, it has proven itself to be a worthy contender in the crowded SUV market. there are two Toyota Highlander Hybrid years to avoid;

• 2006 Highlander Hybrid
• 2008 Highlander Hybrid

That’s a pretty impressive run for a vehicle that is more than 15 years old. However, as stated, the 2008 model takes home the title of worst Highlander Hybrid.

According to CarComplaints, it currently has the most complaints among consumers and the NHTSA. The biggest concern is faulty brakes, which is a very serious problem. To date, braking failure has led to approximately five vehicle accidents.

Moreover, the average cost to repair this issue is $4,170. The silver lining is that the average vehicle mileage when these problems occurred was 119,800.

And then there’s the 2006 Highlander Hybrid. Unfortunately, it also has its fair share of braking problems. Most notably, there are numerous reports of a defective brake actuator.

The average cost to repair this is around $2,970. But as with the 2008 model, the 2006 Highlander Hybrid’s brake issues tend to develop when the mileage is high (165,300 miles).

Toyota Highlander hybrid CVT transmission problems

Toyota has used 4- and 5- speed automatic transmissions in the first generation of the Toyota Highlander. Subsequently, it has incorporated 5- and 6-speed automatic transmissions in its second generation. Its third generation has swallowed 6- and 8-speed automatic transmissions. However, its fourth generation has an 8-speed automatic transmission, along with an eCVT.

What Transmissions Has The Toyota Highlander Used?

Here we see different transmissions the Toyota Highlander has used throughout its journey.

First Generation (2000–2007)

• 4-speed U140E/140F/241E automatic
• 5-speed U151E/F automatic

Second Generation (2007–2013)

• 5-speed U151E automatic
• 6-speed U760E automatic

Third Generation (2013–2020)

• 6-speed U660E/760E automatic
• 8-speed UA80E/UA80F automatic
• Fourth Generation (2019–Present)
• 8-speed UA80F Direct Shift ECT automatic
• eCVT with sequential shift mode (hybrid)

How Long Does A Toyota Highlander Transmission Last?

Fundamentally, the transmission’s reliability is contingent on its kind. However, it is essential to understand that routine maintenance plays a significant part in determining its proper functioning. When it comes to the transmission of the Toyota Highlander, it often lasts between 100,000 to 200,000 miles. To ramp up its lifetime and smooth running, experts suggest sorting out problems simultaneously. Moreover, it is vital to keep the fluid levels topped up.

Common Toyota Highlander Transmission Problems

During the life-cycle of the transmission, it shows different types of problems. For example, here we discuss issues regarding several transmissions of the Toyota Highlander.

U140E

Although the transmission is reliable, it may cause problems when incorporated inside heavy cars with 3-liter engines. As a consequence, its components have to operate under heavy loads. Hence, it may require the first overhaul before a vehicle hits 200 thousand kilometers. After that, it is usually the torque converter that gets replaced.

This requires close attention to the output planet of old transmission units. It might have issues regarding the damage of pinion satellites precipitated by heavy loads. With satellites of the planetary gear, the sun gear also gets damaged.

Another problematic place for the transmission is the back cover. Nonetheless, the problem is prevalent among cars with high-power engines. Statistics indicate that change of steel disks and frictions in the direct package is made three to four times more than in other packages.

The rubber-covered piston remains another frequently replaced component in the direct clutch package. The dry functioning and higher temperature often cause rapid damage to the rubber.

U760E

Over time, drivers may experience rough coasting downshift with the U760E transmission.

Another problem that may emerge along the way is a shaking sensation between 25 and 50mph.

The correct fluid is critical to the transmission since an incompatible one may develop rough shifts. It may also create the shudder emerging from the torque converter clutch.

The wearing of the valve is an additional issue with the transmission. However, you can get over-the-shelf solutions for problems regarding valve body wear.

U660E

The common issue with the transmission is the worn valve body. The contaminated automatic transmission fluid and vitiated torque converter lockup cause slagging or wear-out of plunger valves and channels of the valve body.

The selector position plate with temperature is the most commonly replaced element in the electrical part. The overheating sensor is the reason for the malfunctioning of the valve body.

Overheating is often the initial reason for early problems with electrical components. The repair of the pistons kit often goes with every overhaul of the overheated transmission.

Overlooked bearing vibrations often cause damage to a list of spare parts. It includes crown gear, planetary gears, sun gear, differential, pistons, etc.

Differences Between Transmissions

The U140E is a 4-speed automatic transmission. It mounts on several new platforms since it has obtained compactness. It also has acquired high efficiency that also improves fuel economy. It has also reduced noise, good shift feeling, and swift response.

The U760E is a 6-speed automatic transmission. On the weight front, you can count it as a slightly lighter version of the U660E transmission. But note that both models share several common parts.

Introduced in the 2007 model year of the Toyota Camry, the U660E is a 6-speed automatic transmission. It is used in front-wheel-drive vehicles. Additionally, it is a compact transmission similar to the size of many four-speed transmissions. Interestingly, it has also been used in other Toyota vehicles. It includes Lexus models that have a 3.5-liter engine.

Transmission Fluids And The Toyota Highlander

Well-maintenance of the transmission by sorting out the problems straight away is the first step to ensuring the seamless running of the transmission. Many car manufacturers believe changing transmission fluid every 45,000 miles is a good idea. Notwithstanding, one should remember that different transmissions require different types of fluid. Here we provide you with the source of the transmission fluids that will help you find the one that works with your transmission.

U140E, U760E, U660E: Transmission fluid

Toyota Highlander braking problems

One of these Highlander Hybrid problems involves owners having trouble with braking. This can be due to an unresponsive brake pedal, a brake pedal getting stuck, or suddenly having a tough time pressing the brake pedal. These symptoms are more common in pre-2015 vehicles.

Toyota Camry and Avalon have had the same problems. In the case of these cars, this problem was caused by problems with power brake assist or a failing ABS actuator. In the case of the Camry, Toyota has issued recalls for specific models, but they never did for the Avalon Hybrid and the Highlander.

If you experience hefty braking, it’s most likely a problem with the power brake assist. In this case, the vacuum pump part of the braking system will need to be replaced, which will cost $700. If you experience an unresponsive brake pedal or a delay during braking, it’s likely a failing ABS actuator. Replacing this element will set you back between $900 – $1,100.

Unfortunately, the brakes still don’t seem to be the strong suit of the newer generations of Highlander either. Some 2015 – 2017 owners report a loud noise from the back of the car while braking. Furthermore, even 2020 owners complain about a braking power loss caused by the switch from regenerative to hydraulic braking. This seems to be a bad design, but it creates dangerous situations for drivers.

Toyota Highlander owners have reported 478 service brakes-related problems since 996. Below is a list of Brakes related problems of Toyota Highlander;

• Brake Light On problems   
• Brakes Failed problems     
• Brake Master Cylinder problems  
• Abs Brake Fail problems   
• Brake Abs Warning Light problems         
• Brake Sensor problems     
• Brake Disc Pads problems
• Brake Electric Antilock problems  
• Brake Disc Caliper problems        
• Brake Fluid Leak problems
• Brake Loud Noise problems          
• Brake Foundation Components problems          
• Brake Drum Wheel Cylinder problems    
• Brake Antilock Wheel Speed Sensor problems 
• Brake Squeaking Noise problems
• Brake Disc Rotor problems
• Brake Popping Noise problems    
• Power Assist Brake problems       
• Brake Grinding Noise problems   
• Anti-lock Brakes Fail problems     
• Brake Pedal And Linkage problems        
• Brake Hoses, Lines/piping, And Fittings problems       
• Brake Disc problems          
• Power Assist Brake Vacuum problems   

How do I know if my Toyota Highlander brake pads are worn out?

Some admitted warning signs of detrimental brake pads are:

• Toyota Highlander pulling to one side while braking
• Grinding noise when the brakes are applied
• Burning odor
• Pulsation or vibrating in the steering wheel or brake pedal
• Some vehicles have brake warning lights that will turn on to notify you of a potential issue
• Squealing or screeching when braking

Toyota Highlander Front Brake Pad Replacement

Like rear brake pads, your Toyota Highlander front brake pads will normally degrade at the same rate on your car’s right and left sides. However, unlike rear brake pads, most front brake pads wear down slower due to the nature of rear-wheel-drive cars. Therefore, your brakes should be inspected every time you take your Toyota Highlander for service.

Refer to your Toyota Highlander maintenance guide in your owner’s manual for more information regarding recommended front brake replacement and inspections. Remember that your driving habits vary drastically from the wear and tear on Toyota Highlander, including the front brake pads.

Toyota Highlander Rear Brake Pads Price

Front and rear brake pads on your Toyota Highlander will cost the identical assuming you purchase them on the same date. Parts availability is the main variable in the price for brake pads, although labor costs can change depending on alternative factors in your area.

Labor costs usually won’t be too volatile. If you’re looking to replace your brake pads, parts naturally range from $50 to $200 per brake pad. You can order your Toyota Highlander brake pads online or give us a call during business hours to get pricing and availability.

Toyota Highlander Rear Brake Pad Replacement

Remember that wear and tear on all brake components depend heavily on your driving habits. Therefore, you’ll want to get your brakes inspected during every visit to your mechanic. Still, you should also consult your Toyota Highlander maintenance schedule for details on when inspections and rear brake pad replacement are recommended.

Unlike front brake pads, most rear brake pads wear down faster due to the brake mechanism of rear-wheel commute cars. Similarly, with front brake pads, your Toyota Highlander rear brake pads will consistently wear down at the same value on both the left and right sides of your vehicle.

How much do Toyota Highlander Brake Pads Cost?

How much Toyota Highlander brake pads cost depends heavily on how many brake pads you need to order and whether or not you want to replace the brake pads yourself or have one of our technicians handle your brake pad replacement. Normally brake pads are sold in sets of two, as a break on your Toyota Highlander brake pads is normally the same on both the left and right sides of the vehicle.

A set of luxury vehicle brake pads can cost between $50 and $50, while most distinctive brake pads are between $75 and $0. But, again, this varies widely by brand and does not include installation. In addition, there are specific services to keep an eye on, such as your rotors, which may need to be interchanged if your Toyota Highlander brake pads are heavily worn down.

How do you know if you need new brake pads?

In some cases, you will be able to smell a burning fragrance from the metal contacting the surface as your pads become bare. Natural issues that arise when your Toyota Highlander brake pads need to be replaced include squealing, screeching, grinding, or squeaking when brakes are applied.

You may also notice vibrations or pulsation in the pedal or steering wheel. If you experience any warning signs, you should quickly take your Toyota Highlander in for an inspection. You should always consult your vehicle’s owner’s manual for more details on service intervals, recommendations, and other safety concerns.

What are the best brake pads for Toyota Highlander?

Genuine Toyota brake pads are designed specifically for your Toyota Highlander. They are built on the highest standards, like the authentic brake pads installed on your automobile when leaving the factory.

Genuine parts help provide maximum safety and durability, even more so than other pricey aftermarket parts that were designed to fit multiple types of vehicles. So it’s important to use Toyota authentic manufactured parts on your vehicle.

Can I put new brake pads on old rotors?

The short answer is yes. Toyota Highlander brake components typically wear down at different rates meaning your brake pads will be the first component needing replacement before your brake rotors.

It’s intense to keep your brake pads fresh for safety reasons and to maintain the integrity of the rest of your Toyota Highlander brake components. However, if your brake pads are heavily degraded and not replaced expeditiously, your brake rotors will start to wear down much faster.

It’s also important to consult your owner’s manual for recommended maintenance intervals to ensure your Toyota Highlander is transported for brake service on time.

How much does it cost to get Toyota Highlander brake pads changed?

Toyota Highlander brake pads replacement, which incorporates parts and labor, can cost anywhere between $50 and $300 per axle. Depending on the type of brake pads desired and the extent of the break your previously worn down pads have caused to the distinct parts of your vehicle such as the rotors.

Toyota Highlander Front Brake Pads Price

Typically the cost for parts will include collection from $00-$00 per axle, and labor can cost anywhere between $80 – $00. But, again, consult your service advisor as prices can change quite depending on parts availability.

Most Toyota franchise service centers will run brake specials each month and can save you bountiful money on front brake pad installation. Since your Toyota Highlander brake pads wear down at the same rate per axle, having your front or rear brake pads changed simultaneously is prevalent.

How long do Toyota Highlander brake pads last?

Toyota Highlander brake pads usually last between 30,000 and 70,000 miles depending on your driving habits. If you commute in huge traffic and use your brakes frequently, you’ll need to get an inspection more continually. We recommend you reference your Toyota Highlander owner’s manual for recommended maintenance interval information.

Toyota Highlander hybrid heater not working

The most common reasons a Toyota Highlander heater isn’t working are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor.

How the Heater Works

At the simplest level possible, the heater works by passing hot coolant from the engine into a tiny radiator called the heater core. At this point, the blower motor blows air across it, and the newly heated air blows onto the driver and passengers. If the heater has stopped working in your Highlander, this process has failed in one way or another.

Reasons your toyota highlander heater is not working;

Note: If there is no coolant in your overflow, you can refill it by adding more to the overflow reservoir. There is rarely a situation where you would need to take the radiator cap off the radiator to add coolant.

The exception would be when you have reason to believe that the hose from the reservoir to the radiator is clogged. Anytime you put your hand around the radiator or fans in the engine, assume that they are hot. And that the fans can kick on at any time, even without your key in the ignition.

Low Coolant

While not having enough coolant may make your engine run hotter, it can also cause your Highlander not to be able to create enough heat. If there isn’t enough line pressure due to low coolant, then the heater core will not be able to get any coolant itself. 

You can verify this by checking the coolant level by peaking at the overflow reservoir. The overflow reservoir will be connected to the radiator by a tube from the top (usually right by the radiator cap). It should have separate lines to indicate “cool hot” and “cool cold.” Some vehicles only have full hot. Never touch the radiator cap unless the vehicle is ICE COLD.

Bad Thermostat

The job of your Highlander’s thermostat is to regulate the engine’s temperature. It does this by allowing water to enter the engine when it is hot and keeping coolant from entering while the vehicle warms up.

Sometimes when a thermostat goes bad, it stays stuck open. This allows the coolant to enter the engine continuously. When this happens, it’ll feel like the heat is barely working, or you may notice that it’ll work if the vehicle isn’t moving, but if you get on the highway, it stops working.

If your Highlander has a built-in temperature gauge, look at it and see if it is in the spot it is normally in after a bit of driving. If it looks colder than normal, that’s a good indication of something wrong with the thermostat.

Heater Core

The heater core itself can go bad. Over time, they are known to clog and fail. If you have a heater core that is clogged, it’s not going to be able to pass coolant through. Without the warm coolant going through it, there can be no heat. A bad heater core can also leak, so watch out for that. Feel your passenger floorboard to see if it’s wet.

Heater cores are typically pretty affordable.

Hose to/from the Heater Core

Two hoses are coming to and from the heater core. They both should feel warm or hot to the touch when the engine is running. If one of the hoses is hot and the other is cold, that is a pretty good indication that the heater core is clogged. If neither hose has any heat, you may have air in the cooling system, low fluid, or low pressure.

Water Pump

If you look at your temperature gauge, and the engine is running hotter than normal, but there is no heat from the heater, you may be having issues with the water pump. Try taking the vehicle out of gear and revving the engine a little. If you feel the heat start to blow hot for a few seconds, that indicates a bad water pump or low coolant. Also, the serpentine belt going to the water pump is going bad, and it cannot turn as fast as it needs to. 

Potential Fixes

Blower Motor Replacement

When the blower motor fails, the air conditioner and heater may still work, and heat or cool may be felt at the vents, but the air pressure will dramatically decrease. This will occur at all fan speeds and all temperatures. Another possible failure symptom is a rattling or grinding noise that comes from the passenger floorboard anytime the heater or A/C is active. This can be caused by broken fan blades or a faulty bearing. This noise may come and go randomly, and the fan speed may or may not change the noise.

Heater Control Valve Replacement

When the heater control valve fails, adjusting the temperature may not change the air temperature at the vents, whether hot or cold. Also, the valve could leak engine coolant, possibly causing the vehicle to overheat.

Heater Core Replacement

A failing heater core may cause the car’s interior to smell like engine coolant. The smell will become worse when the heater is turned on. The engine may also begin to run hotter until the vehicle is repaired. The worst-case scenario is the engine overheating, which can cause extensive engine damage. If the heater core is clogged, the air that blows when the heater is turned on will not be very hot.

Heater Hose Replacement

A failing heater hose may cause the vehicle to smell engine coolant under the hood. If coolant runs onto the heater core inlet or outlet, the cabin could begin to smell coolant and mildew. Also, the engine may run increasingly warmer until the vehicle is repaired. Coolant may leak onto the engine, firewall, and ground, as a defective hose may swell and burst. The worst-case scenario is engine overheating and possible cylinder head gasket failure.

Thermostat Replacement

A bad thermostat can cause two different sets of problems, depending on whether it’s stuck open or stuck closed. A stuck open thermostat can cause the engine to run colder than normal and turn on the check engine light. It may also cause poor fuel mileage and the heater to blow cool air. A thermostat that is stuck closed will cause the vehicle to overheat. The cooling system must be checked for other issues if a new thermostat doesn’t resolve engine temperature problems. »

Blower Motor Resistor Replacement

When the blower motor resistor fails, the air conditioner and heater may still work, but air may blow from the vents at only some of the fan speed settings. If the resistor isn’t replaced for some time after starting to act up, it may fail, leaving the entire system useless.

Toyota Highlander hybrid AC not working

The most common causes that hinder the normal air conditioning system operating on your Toyota Highlander are;

1. Dirty cabin air filter

The pollen filter, also known as the cabin filter or microfilter, is a central component of the ventilation system in your Toyota Highlander. A dirty filter causes the overall ventilation of the interior to deteriorate, resulting in reduced cooling, heating, and airflow. It also puts unnecessary strain on the entire AC system, negatively impacting your Highlander’s fuel consumption.

There is no prescribed time for changing the cabin air filter, but most manufacturers recommend a change after 10,000-20,000 miles. However, if you drive your vehicle in a dusty or polluted environment, the filter can get dirty sooner than the manufacturer recommends.

Start by inspecting the condition of the cabin air filter on your Highlander. Instead of changing it directly, cleaning the pollen filter is often recommended. This can be done, for example, with a vacuum cleaner or a compressed air system, removing at least a large part of the visible dirt particles. Unfortunately, this procedure does not allow you to get into the deeper layers of the filter. Therefore, the filter performance will not increase significantly even after cleaning. But, as a rule, there is no avoiding a change.

Note: Dirty cabin air filter mostly only leads to reduced cooling. If only hot air comes out of the air vents in your Highlander, then the problem probably lies elsewhere.

2. Dirty or clogged condenser

Like the radiator, the air conditioning condenser on Toyota Highlander sits at the front of the vehicle. It is responsible for releasing the heat from the refrigerant into the ambient air. However, over time, grime, bugs, and other small particles can build up on its surface and in the gaps of its mesh. This hinders the condenser’s ability to release heat as less air passes through the mesh, resulting in poor interior cooling.

If the condenser is dirty on your Highlander, the simplest solution is to clean it. However, you normally have to remove the front bumper to gain access to the condenser. You can use a power washer for cleaning, but ensure it is at a low-pressure setting, as high pressure can easily damage the delicate fins on the condenser.

A clogged or leaking condenser can also be the reason for air-conditioning not working properly on your Highlander. A leaking condenser can lead to a loss of refrigerant and reduced system cooling performance.

A leak search is carried out in the workshop using forming gas to find leaks in the air conditioning system. This will help determine whether the loss of refrigerant is due to a defective condenser. If this is the case, the only option is to replace the broken part.

3. Refrigerant Leak

Insufficient refrigerant is still the main cause of a non-functioning AC system. A loss of up to 15% of the refrigerant per year is normal due to the design. If you don’t have the system regularly serviced on your Highlander, the refrigerant level will eventually get so low that the system loses its cooling capacity. Just have it refilled, and you can drive with pleasant temperatures again. If the refrigerant level goes down again quickly, there is probably a leak.

In addition to the normal loss, component defects are usually responsible for escaping the refrigerant gas on Toyota Highlander. A defective sealing ring, a worn line, or a condenser that a stone chip has damaged are the most common causes.

Finding these mostly very small leaks is often not easy. The system is filled with forming gas (nitrogen with a little hydrogen) in the workshop. Larger leaks may already be heard, or you can find them with a leak detection spray. Smaller holes must be localized by searching all components with a gas detector. Once the leak has been found, this must be closed again by replacing the respective component.

4. Dirty evaporator

A dirty evaporator can also be the reason for AC problems on your Toyota Highlander. The cabin air filter captures most dirt or other airborne particles, but some escape and fall onto the evaporator. Over time, these dust particles can build up on the fins and block the airflow through the evaporator, resulting in poor cooling.

The two most prominent symptoms of a clogged-up evaporator on your Highlander are:

The airflow from the vents is choppy and not smooth.

The inside of the vehicle is developing a bad moldy smell.

Cleaning the evaporator on Highlander is not a simple task. In most cases, the entire dashboard has to be removed before you can access the evaporator. Therefore, it is recommended to do this at a workshop.

There can also be a refrigerant leak in the evaporator. In that case, the evaporator will have to be replaced.

5. Compressor failure

The compressor is the heart of the entire air conditioning system on the Toyota Highlander. It consists of moving parts that convert what is a gaseous coolant into liquid – this is how your vehicle is cooled.

A broken compressor is usually irreparable. If the air conditioning is switched regularly, the parts remain movable. However, the parts will stick if you don’t turn on the air conditioning on your Highlander for a long time. The result is a defective compressor that can no longer be repaired. The only thing that helps is swapping with a new one.

The worst damage, however, is a failure of the AC compressor when it “eats” itself due to insufficient lubrication or a production error, metal chips form, which is distributed throughout the Highlander’s AC system. If you only install a new compressor here, another failure is inevitable, as the chips immediately destroy the new component.

In such a case, the entire air conditioning system must be replaced. A maximum of the metal pipes can be rinsed here. Since the two heat exchangers (condenser and evaporator) are designed in cross-flow design, the detergent finds the path with the least resistance and leaves the chips behind. However, the high-pressure refrigerant pulls these chips back during operation, and the subsequent damage is inevitable.

6. Bad blower motor

If there is no airflow or reduced airflow from the vents on your Toyota Highlander, a bad blower motor could be the culprit. A worn-out or weakened blower motor can also produce abnormal sounds when in operation. Unfortunately, you cannot repair a broken blower motor. Instead, the part must be replaced with a new one.

Note: If the blower motor suddenly fails from one second to the next, you must first check whether a blown a fuse is responsible for the failure.

7. Faulty blend door actuator

The blend door actuator plays a role in controlling the airflow and temperature inside your Highlander. Therefore, anytime there is a problem with the temperature of the air conditioning system, it could be a problem with the blend door actuator.

The most common symptom of a faulty blend door actuator on Toyota Highlander is a slight clicking sound repeatedly coming from under the dashboard. The sound will be most prominent for a few seconds when you turn on the air conditioning or adjust the temperature. Sometimes changing the temperature can temporarily stop the sound.

A knocking noise could indicate a bad blend door actuator on your Highlander, although it is quite rare. Instead, the sound is like a light tapping on the door when you turn on the air conditioning system or turn off the engine.

Potential Fixes

AC Recharge

You may not realize a refrigerant leak until the air conditioner stops blowing cold. Refrigerant may slowly leak out of the system over days, weeks, or even years.

AC Compressor Replacement

When the compressor fails, the most common symptom is warm air from the vents. A squealing or grinding noise may also be heard from the compressor in the event of mechanical failure.

AC Condenser Replacement

When the condenser fails, the air conditioner will fail along with it. The engine idle speed will not undulate as normal when the air conditioner is turned on, and the air in the vehicle will be warmer than the ambient temperature.

AC Evaporator Replacement

Anytime the AC evaporator goes bad, the air from the vents will be warmer than expected. A clogged or leaking evaporator won’t get enough refrigerant to cool the air. In some vehicles, there may be a warning like a blinking AC switch.

Blower Motor Replacement

When the blower motor fails, the air conditioner and heater may still work, and heat or cool may be felt at the vents, but the air pressure will dramatically decrease. This will occur at all fan speeds and all temperatures. Another possible failure symptom is a rattling or grinding noise that comes from the passenger floorboard anytime the heater or A/C is active. This can be caused by broken fan blades or a faulty bearing. This noise may come and go randomly, and the fan speed may or may not change the noise.

Toyota highlander hybrid temperature gauge not moving

A faulty coolant temperature sensor is the most common reason your temperature gauge is not moving. It can also be caused by bad wirings between the cluster and sensor. In some cases, it can also be a stuck thermostat causing the engine not to heat up properly.

Here is a more detailed list of the most common causes when a temperature gauge is not moving;

1. Faulty Engine Coolant Temperature Sensor

As we talked about, the most common problem with a faulty engine temperature reading is the coolant temperature sensor itself, sending the information to the cluster.

Some cars have two temperature sensors, while other car models have one. The models with one sensor usually use the engine control unit’s temperature and the same sensor for the gauge.

If your car model has two coolant temperature sensors, one is used by the temperature gauge, and one is used for the engine control unit.

Engine temperature sensors are easy to measure with a multimeter, but you need to find the right values for them. You can often find more information on how to test them in your repair manual.

However, if you decide to replace one of them, you should make sure to replace the sensor going to the temperature gauge – if you have two.

2. Broken Wirings

If you have two temperature sensors on your car and one separate for the gauge, you need to check the sensor’s wires to the gauge or measure the sensor from the cluster connector.

If you have one sensor for both of them, there could be a problem with the wires between the sensor and the ECU. Or a wiring problem between the gauge and the ECU. Check for any broken wires between these components.

The best way to find broken wiring is to measure the resistance with a multimeter from all the wires’ directions. However, this requires some electronic car knowledge, and you may have to let your mechanic look at it.

You can also find information about this in your repair manual. Check a wiring diagram of your car to measure the wiring correctly.

3. Faulty Gauge/Cluster

The next problem is a faulty temperature gauge. However, most temperature gauges are integrated with the instrument cluster on modern cars. Sometimes, you can replace the temperature gauge or repair any bad soldering if you find any.

In other clusters, you might have to replace the instrument cluster. However, you can often leave your instrument cluster to an expert to repair the soldering if you do not know-how.

A faulty cluster is not a very common problem, though; they are often pretty expensive and need coding after replacement. Therefore, checking the other things before you decide to replace the cluster is recommended.

You can also test the cluster temperature gauge with an Ohm tester if you have some knowledge.

4. Corrosion in plug connectors

Corrosion in the connectors is also a common problem concerning a faulty temperature gauge. Clean and spray electronic cleaner in the connector at the sensor, the engine control unit connector, and the cluster’s connector.

If corrosion appears, there might be a problem with the connectors’ sealings, and you may have to look at these to make a permanent repair or replace them to avoid future problems.

5. Bad Thermostat

The thermostat restricts the coolant from flowing through the radiator. If this gets stuck on wide open, the temperature might not reach optimal.

However, this will often increase your temperature a bit from the min mark if you drive hard enough. If your temperature gauge is going up slowly, you might have a

6. Air in the Cooling system

Air in the cooling system can also cause the temperature gauge to stay cold if there is an air bubble at the sensor spot. This can also often be indicated with a fluctuating coolant temperature gauge.

If you suspect air in the coolant system, you have to bleed your coolant system with a unique bleeding technique.

7. Broken Engine Control Unit

This only applies if your car uses one combined temperature sensor with two pins.

In rare cases, your engine control unit could be a problem if the temperature information is received first to the ECM sending, then data to the cluster.

If this is the case, you must check the trouble codes with an OBD2 scanner in the engine control unit to see if the engine control unit receives the temperature information.

If you can find the temperature readings in the engine control unit but not at the cluster, you have to ensure they use the same sensor. If this is the case, you have to measure the temperature output on the engine control unit. To do this, I recommend letting a car electronics expert do the job for you.

You do not want to replace the engine control unit if there’s no problem with it because they’re often costly and require coding.

Toyota Highlander hybrid will not start

The most common reasons a Toyota Highlander won’t start are a dead battery, an alternator problem, or failed starter.

Potential Fixes

Battery Replacement

The battery is considered dead when there isn’t enough charge to start the engine or run electrical components. Normally, the first sign is dim lighting in the vehicle’s interior, and when you try to start it, the engine may crank slowly or not at all. A very rapid clicking noise is normally heard if any charge is left in the battery, but the vehicle will be completely unresponsive in many cases. If the battery is losing charge while driving the vehicle, the battery warning light will illuminate, and the engine may stall.

Fuel Pump Replacement

If the fuel pump leaks or makes a lot of noise, get it looked at immediately. A failing fuel pump will not create enough pressure in the fuel system, possibly causing a loss of engine power or preventing the car from starting. It may also cause the check engine light to come on. More symptoms of a bad fuel pump

Ignition Switch Replacement

When the electrical portion of the ignition switch fails, the vehicle will permanently or intermittently lose power to certain systems and components, depending on which position of the key. As a result, the vehicle may not turn on accessories like the air conditioner, or the vehicle may fail to start. In addition, in sporadic cases, the vehicle may randomly fail to respond to the key being turned or stall while driving. These symptoms may come and go before the ignition switch completely fails.

Ignition Lock Cylinder Replacement

When the ignition switch lock cylinder fails, it can create a situation where the ignition cannot be turned or takes much wiggling and shaking before it finally turns. Or, the ignition may turn and run with the key removed or lets the key be removed in any position. Lastly, the lock can fail to release your key or not allow the key to travel into the ignition lock cylinder.

Starter Replacement

Starter motor failure produces one common symptom across all makes and models: When you turn the key, the starter solenoid will click, but the engine will not rotate. You also might hear a whirring or fast spinning noise when the key is turned. In this case, the starter solenoid and starter should be inspected for failure.

Camshaft Position Sensor Replacement

When the computer senses the engine is out of time, it will turn on the check engine light. The engine may stall or even just fail to start. If the engine runs, it will run poorly and get bad fuel mileage. 

Crankshaft Position Sensor Replacement

When the computer senses the engine is out of time, it will turn on the check engine light, and the engine may start and stall or fail to start at all. If the engine runs, it will run poorly and get bad fuel mileage.

Why does the Toyota Highlander hybrid inverter fail?

Toyota recalled the model year 2006-2010 Highlander hybrid vehicles manufactured February 16, 2005, through July 29, 2010; and model year 2006-2008 Lexus RX400h vehicles manufactured February 23, 2005, through December 2, 2008.

The Intelligent Power Module “IPM” inside the inverter module may contain transistors with higher operating temperatures than the solder can support. As a result, the transistors may be heat damaged by the solder.

The affected vehicles cover model years 2006 through 2010 for the Highlander and 2006 through 2008 for the RX. Both vehicles share a platform and use the same powertrain.

The recall will fix transistors in the hybrids’ inverter assemblies, which Toyota says can “experience heat damage due to variations in characteristics of the transistors’ parallel circuits.”

Signs that your highlander hybrid inverter has failed

When inverter failure occurs, various warning lamps will be illuminated on the instrument panel, including the malfunction indicator lamp, slip indicator light, the brake system warning light, and the master warning light.

The vehicle may enter a fail-safe/limp-home mode that limits the drivability of the vehicle. In addition, the hybrid system may shut down while the vehicle is being driven, causing the vehicle to stall unexpectedly, increasing the risk of a crash.

How often should you replace your highlander hybrid inverter?

According to the Toyota Highlander Hybrid maintenance schedule, the Toyota Highlander Hybrid service intervals come at 5,000, 15,000, and 30,000 miles. Servicing is key to keeping your car in peak driving shape and ensuring your warranty remains intact.

Additionally, Toyota recommends inspecting and topping off the inverter coolant reservoir every 5,000 miles and a complete drain and replacement every 100,000 miles. Flushing the hybrid inverter cooling system is much the same as flushing the engine cooling system, except there are fewer components to deal with, and the components are typically more accessible. Finally, chemicals are introduced into the hybrid inverter cooling system through the fill port, and the system is run.

5 Signs Your Hybrid Vehicle’s Battery is Dying

If you’re new to the world of hybrid cars, you may need to familiarize yourself with some of the telltale signs your hybrid needs attention. For example, when this kind of vehicle’s battery begins to go, its symptoms are different than those of a conventional gas combustion engine.

Regardless of the make and model, you’ll likely experience at least one of the following symptoms when a hybrid vehicle’s battery begins to fail.

1. A decrease in fuel economy

If you’re not getting the gas mileage you should, it likely indicates that the battery is dying. The purpose of the hybrid vehicle’s battery is to provide energy to fuel your car. So, when the battery begins to go, your car reverts to relying on the gas combustion engine as its power source. Increased stops at the gas station are a sure sign the battery’s failing.

2. Fluctuations in the state of charge

Does your display show an erratic charge? Does it indicate your battery’s completely charged in one instance and extremely low moments later? The vehicle’s battery could be overcharging or unable to hold a charge.

3. The battery’s not holding a charge

When you park your car overnight and leave it charged only to return to a low battery in the morning, it’s a definite sign that your hybrid vehicle’s battery needs diagnostic attention.

4. The internal combustion system runs more than it should

An internal combustion engine that begins to run more than it should or kicks on at unexpected times tells you something. It’s time to include a battery checkup very soon.

5. Strange engine noises

A battery that’s running hot alerts the electric fan that it needs to cool down. Running a battery too hot may damage it as well as its components. 

What is the average life expectancy of a hybrid vehicle’s battery?

Cost and life expectancy are two of the biggest differences between a hybrid and a conventional battery. While a typical car battery may last about five years on average, it’s also relatively inexpensive to replace. Prices vary, but you can expect to pay around $120 or less.

A hybrid battery, by contrast, can cost as much as $3,000 to replace. Moreover, there’s much more involved than simply replacing a battery. The hybrid system consists of an entire package of batteries. So before you break out in hives and require oxygen, listen to the good news that accompanies a hybrid.

Hybrid batteries are usually “guaranteed by the manufacturer for 80,000 to 100,000 miles,” which equates to about ten years, depending on your driving habits. In addition, when your battery dies within the “warranty period,” the replacement costs are covered.

A second factor in the hybrid battery department is that you can often recondition rather than replace it. For example, a hybrid battery may consist of 28 separate modules. Instead of replacing the entire system, you can identify and replace the faulty module for a fraction of the cost. A reconditioned battery may run you in the ballpark of a more affordable $700 or $800.

It’s worth researching the value of a hybrid vehicle. Of course, like any other car, maintenance is required for optimal performance. However, with consistent technological advancements, hybrids can make real financial sense.

Why would my Toyota Highlander hybrid die?

If your Toyota Highlander is shutting down while driving, it’s a real safety hazard. Vehicles are a lot harder to control without power brakes or steering. Below is a list of common reasons why your Highlander randomly dies while driving. 

1. You are out of fuel

Your engine needs three things to run properly; air, fuel, and spark. If your engine is running fine and then it just suddenly dies, one of these three things was abruptly taken away. It’s usual fuel.

The most common reason a vehicle shuts off when driving is a lack of fuel. The most likely cause is an empty fuel tank aided by a fuel gauge that’s not as accurate as it looks. Even if it says, there is fuel in there, bang on the tank. If it makes a hollow sound, it’s probably empty.

2. Faulty fuel Pump or Filter

Another common reason that your Highlander may be starving for fuel is a bad fuel pump. The fuel pump is responsible for sending highly pressurized fuel to the fuel rails. The engine can die if the fuel pressure is not high enough to atomize the gasoline properly.

The fuel pump is often not monitored by the engine’s computer, which means it doesn’t activate the check engine light when you are trying to figure out why the vehicle is randomly dying. So this is the best place to start.

If the engine isn’t starting, turn the key to the on position and listen carefully. You should hear a whining noise. That’s the fuel pump priming the fuel system. If you hear nothing, that strongly indicates that the fuel pump is bad. Since the fuel pump is in the tank, you may want to get a second set of ears so you can be sure you don’t hear it. 

If you don’t hear it, you should manually check the fuel pressure at the fuel rails. If it is not as high as it should be, you either have a bad fuel pump or filter. Also, the fuel pump may be going out sporadically. This would mean it’ll die on the road and then fire back up even a few seconds later.

3. Battery Cables

Check the battery cables to ensure they are free of debris and are properly bolted to the battery posts. Next, follow the black ground cable to whatever it is connected to and ensure it is secure. Also, ensure no corrosion or rust keeps it from making a solid ground connection.

4. Engine to Chassis Ground

The engine needs a strong ground to the chassis for your Highlander’s various electrical systems to work. If that cable is corroded, there could be problems such as misfiring, slow/no starts, or even the engine dying while driving. This is a common cause of many “gremlins.”

5. Bad Alternator

The alternator is responsible for charging the battery and keeping your Highlander running. If the alternator goes bad, the vehicle will run off the battery’s power supply (which is there mostly for starting the vehicle and as a backup reserve).

Once the battery has been depleted, the ignition system will no longer be able to fire properly. You should see either a battery or alternator light long before the engine dies. If you didn’t see it, it’s highly unlikely that the alternator or battery is at fault. If you did see the warning light, have the alternator and battery tested at the parts store. Replace them as needed.

6. Issue With Sensors

The crankshaft and camshaft sensors are responsible for telling the engine where the crank and cam are located in their 360° revolutions. If they stop reporting this data, the vehicle will not know when to fire the spark plugs, and it’ll stop running.

The mass air flow sensor can also go bad. These sensors should trigger a trouble code if they have a problem through.

Toyota Highlander hybrid air conditioning not cooling

The most common reasons a Toyota Highlander AC isn’t working are a refrigerant leak, an electrical climate control issue, or a problem with the air conditioning compressor.

1. Low refrigerant

Insufficient refrigerant in the AC system is one of the leading causes of AC not blowing cold air in Highlander. This can happen due to a leak or if the AC has not been recharged for a long time.

Refrigerant leak

A low refrigerant level in your Highlander does not necessarily mean a leak. Ideally, the refrigerant should never leak in a properly sealed AC system. Still, most car AC systems leak refrigerants over time due to minor imperfections and will need recharging every few years.

If you don’t service the AC system in your Highlander for a long time, the refrigerant level will eventually get so low that the system loses its cooling capacity. Just have it refilled, and you can drive with pleasant temperatures again. If the refrigerant level goes down again quickly, there is probably a leak.

Refrigerant leak causes;

Refrigerant leaks in Highlander can be caused by leaking O-ring seals, leaking condenser or evaporator core, or a cracked hose. The leak can be diagnosed by injecting a small amount of fluorescent dye into the AC system. The leaking component will shine under UV light when the refrigerant leaks again.

How to recharge AC refrigerant in Toyota Highlander

There are two ports in the air conditioning system of Highlander. One is labeled H for high-pressure, and the other is L for low-pressure. You can recharge your AC through the low-pressure port with a do-it-yourself AC recharge kit.

• Open the hood of your Highlander.
• Check which type of refrigerant your vehicle uses. This information is typically stored under the hood and/or in the owner’s manual.
• Start the engine.
• Turn on the AC and set it to the coldest setting, and the fan speed maximum.
• Remove the cap from the low-pressure service port labeled L, and connect the AC recharge kit.

Note: If the ports are not labeled, try connecting the recharge kit to unlabeled ports on the AC hoses. The recharge kit will only properly connect to the low-pressure port and will not fit the high-pressure port.

Shake the canister briefly and release the refrigerant into the system until the recommended pressure has been achieved.

Note: See next section for recommended pressure values.

Warning: Wear gloves and safety glasses before recharging the AC to avoid accidental exposure to harmful chemicals in the refrigerant. It is also cryogenic and can cause severe frostbite when it comes in contact with the skin.

2. Overcharged refrigerant

Just like with low refrigerant, the AC in Highlander will blow warm air only if the AC system is overcharged with refrigerant. An overcharged system affects cooling performance, can damage the compressor, and sometimes cause a major leak.

The refrigerant pressure is affected by the outside atmospheric temperature. So, even if you recharged your Highlander AC at the recommended pressure, the system could still over-pressurize when the ambient temperatures get warmer.

Most modern vehicles use R-134a refrigerant, but newer vehicles are increasingly using R-1234yf as a more environmentally friendly replacement. The pressure values based on ambient temperatures differ depending on the type of the refrigerant. Check your vehicle’s owner’s manual or look under the hood to find the type of refrigerant your vehicle uses.

Check refrigerant pressure

Connect the pressure gauge to the low pressure (L) port in Highlander. If the pressure is higher than the recommended, let some refrigerant out, preferably into a rag, to avoid exposure.

3. Clogged cabin air filter

The pollen filter, also known as the cabin air filter or microfilter, is responsible for filtering the air passengers breath in Toyota Highlander. A dirty filter causes the overall ventilation of the interior to deteriorate, resulting in reduced cooling and airflow. It also puts unnecessary strain on the entire AC system, negatively impacting fuel consumption.

There is no prescribed time for changing the cabin air filter, but most manufacturers recommend a change after 10,000-20,000 miles. However, if you drive your vehicle in a dusty or polluted environment, the filter can get dirty sooner than the manufacturer recommends.

Can you clean a dirty cabin air filter?

Instead of changing the cabin air filter in Highlander, it is often recommended first to clean the filter. This can be done, for example, with a vacuum cleaner or a compressed air system, removing at least a large part of the visible dirt particles. Unfortunately, this procedure does not allow you to get into the deeper layers of the filter. Therefore, the filter performance will not increase significantly even after cleaning. As a rule, there is no avoiding a change if the filter is dirty.

Note: Dirty cabin air filter mostly only leads to reduced cooling. If only hot air comes out of the air vents in your Highlander, then the problem probably lies elsewhere.

4. Dirty condenser

The air conditioning system in Toyota Highlander has a condenser coil that sits at the front of the vehicle and is responsible for releasing the heat from the refrigerant into the ambient air. However, over time, grime, bugs, and other small particles can build up on its surface and in the gaps of its mesh. This hinders the condenser’s ability to release heat as less air passes through the mesh, which results in poor cooling in the cabin.

Clean the condenser

If the condenser is dirty on your Highlander, the simplest solution is to clean it. For this, you normally have to remove the front bumper to access the condenser. You can use a pressure washer for cleaning, but ensure it is at a low-pressure setting, as high pressure can damage the delicate fins on the condenser.

5. Dirty evaporator

A dirty evaporator can also significantly reduce AC cooling performance in Highlander. The cabin air filter captures most of the dirt or other airborne particles, but some particles escape and can get lodged in the evaporator. Over time, these particles build up on the fins and block the airflow through the evaporator, causing reduced airflow in the cabin and poor cooling.

Symptoms of a dirty evaporator

The two most prominent symptoms of a clogged-up evaporator in Highlander are: the airflow from the AC vents is choppy and not smooth, and the inside of the vehicle is developing a bad moldy smell.

Clean the evaporator

Cleaning the evaporator in Highlander is not a simple task. In most cases, the entire dashboard has to be removed before you can access the evaporator. Therefore, it is recommended to do this in a workshop.

6. Faulty compressor

The compressor is the heart of the air conditioning system in Toyota Highlander. It is not only responsible for pumping the refrigerant throughout the AC system but also for converting the refrigerant from a gaseous state to a liquid state as it passes through the condenser. As a result, if the compressor fails, the AC will only blow warm air.

Causes of compressor failure

Insufficient lubricant: The compressor in Highlander needs lubrication to function properly and minimize mechanical wear by reducing friction. If there isn’t enough oil added with the refrigerant or to the compressor itself if replaced, the compressor’s internal components will wear out and cease to function.

Too much oil: If there is an excessive amount of oil added to the refrigerant, it can cause compressor performance issues, reduce cooling efficiency, and cause premature compressor failure.

Remember, an AC compressor can fail without any apparent cause, especially in older vehicles or vehicles that have racked up too many miles. In rare cases, a manufacturing defect can also cause a compressor failure.

7. Overcharged oil

Suppose you are only topping off the refrigerant in your Toyota Highlander with off-the-shelf refrigerant recharge cans and not repairing the leak. In that case, you may have flooded an AC system with oil since these cans often contain added oil.

The excess oil may pool in various places of the AC system. As a result, it can coat the inner walls of the evaporator and condenser, diminishing their ability to absorb or dissipate heat, consequently reducing the overall cooling performance. Excessive oil can also reduce the performance of the compressor and can cause it to fail prematurely.

8. Clogged expansion valve or orifice tube

Your vehicle’s air conditioning system has an expansion valve or an orifice tube, depending on the model. The function of the expansion valve and orifice tube is the same, to restrict the flow and reduce the pressure of the refrigerant before it enters the evaporator coil. Unfortunately, both are at risk of clogging due to contamination, for example, metal shavings from a failing compressor.

In case of contamination, you may have to flush out the contaminants from the AC system of your Highlander, including the condenser and the evaporator, before putting in the new part. In case of severe contamination, multiple components may have to be replaced, including the condenser, the evaporator, and the compressor.

9. Dirty blower motor

The blower motor is the central component of the air conditioning system in Highlander, responsible for blowing cold air through the AC vents. Although most of the dirt and other particles in the air are filtered by the cabin air filter, some particles escape and can cling to the fins of the blower cage. As a result, dust can accumulate over time on the fins and reduce the airflow, reducing cooling performance.

If too much dirt is caked in the blower fins, it can throw off the balance of the spinning cage and cause it to wobble. This puts strain on the motor, further reduces the air flow and cooling performance, and may cause unusual noises from behind the dashboard.

Clean the blower motor

Remove the blower motor, typically located under the passenger side dashboard, and inspect the condition of the cage. If found dirty, clean it using a brush.

10. Sluggish blower motor

Suppose the blower motor in your Highlander is not spinning fast enough either due to an internal defect or due to a fault in the resistor/control module. In that case, the AC cooling performance will be degraded due to reduced airflow.

When a blower motor goes bad, it usually makes unusual noises when operating, and the passengers may feel reduced airflow from the AC vents. However, keep in mind that reduced air flow doesn’t always indicate a problem with the blower motor, as it can also happen due to a clogged cabin air filter, dirty evaporator, or a bad mode door actuator. So, all of them must be inspected when diagnosing poor airflow.

11. Faulty blend door actuator

Blend door actuator plays a role in controlling the temperature inside your Highlander. So if there is a problem with the temperature of the air conditioning system, it could be due to a bad blend door actuator.

The most common symptom of a faulty blend door actuator in Toyota Highlander is a slight clicking sound (or other unusual noise) repeatedly coming from under the dashboard. The sound will be most prominent for a few seconds when you turn on the air conditioning or adjust the temperature.

Symptom: knocking sound

A knocking noise from behind the dashboard could indicate a bad blend door actuator in your Highlander. The sound is like a light tapping on the door, typically when you turn on/off the air conditioning system or start the engine.

Symptom: creaking sound

A bad blend door actuator makes a strange creaking sound when adjusting the climate control temperature.

One side hot, the other side cold

A common symptom of a faulty blend door actuator in vehicles with dual-zone climate control systems is one side blowing hot air while the other is blowing cold air.

Replace the faulty part

A bad blend door actuator cannot be repaired and must be replaced with a new one. Due to the complexity of the replacement job, it is not recommended as a DIY project. In addition, the blend door actuator may require recalibration after replacement.

12. Blown fuse or bad relay

Check all the relevant fuses and relays related to the air-conditioning system in your Highlander. Check the owner’s manual of your vehicle or the fuse box cover to find the exact location of the AC fuses. If the fuse is blown, replace it with a new one with the specified amp rating.

13. Bad climate control unit

The climate control module is the brain of the air-conditioning system in your Toyota Highlander, responsible for controlling all the components in the system. In rare cases, a fault in the climate control unit can cause the AC to stop cooling.

Use OBD2 scanner for diagnosis

Since Toyota Highlander is equipped with on-board diagnostics (OBD), a fault diagnosis can provide initial indications of where the malfunction is located in the air conditioning system.

OBD2 scanners are now available in various designs. You can use a standalone diagnostic device (shown above) or get an OBD2 adapter that connects with a smartphone app via Bluetooth or WiFi.

To troubleshoot, you must first connect the diagnostic tool to your Highlander. The OBDII connector is usually located under the dashboard. With the tool connected, turn on the ignition. Most diagnostic devices then ask for some information about the vehicle. You must enter this 100% correctly. Otherwise, the result of the search may be inaccurate.

In addition to the vehicle make, model, and engine type, you must also type in the Vehicle Identification Number (VIN). Since some OBD codes are manufacturer-specific, the scanner can give you more accurate information if you enter more details about your Highlander.

Toyota Highlander hybrid is not getting great gas mileage

Poor gas mileage, especially a sudden drop in fuel efficiency, can be blamed on several issues. It can also indicate a much more serious issue that, if left unrepaired, can develop into an expensive repair.

There are dozens of problems that can lead to a drop in gas mileage. Some of them are serious, and some can be easily corrected. Here are some of the more common issues that can affect the fuel efficiency of most cars.

Common reasons for this to happen:

Dirty Oxygen Sensor

An oxygen sensor measures how rich or lean the exhaust gases are when they leave the combustion chamber. The vehicle computer uses the data to adjust the amount of fuel entering the engine. If the sensor is dirty or failing, it can lead to a drop in miles per gallon. Unfortunately, it can lead to failed emission tests and a rough idle.

Dirty Fuel Injectors

Fuel injectors spray fuel into the cylinders where it is mixed with air and ignited. Over time the fuel injector system can become clogged. This can lead to a drop in fuel efficiency, slow acceleration, and the car not having enough power. If caught early, simply cleaning the injectors can solve the problem. As it progresses, the injectors may have to be replaced.

Bad or Dirty Spark Plugs

Spark plugs ignite the fuel in the combustion chamber. If they are dirty or working incorrectly, it can cause the engine to misfire, leading to poor engine performance. This can lead to a lack of power and a big decline in fuel efficiency.

Malfunctioning Mass Airflow Sensor

A mass airflow sensor detects the amount of air coming into the fuel injection system. It delivers that information to the vehicle’s computer, which crunches the numbers and then delivers the proper amount of fuel to the air in the vehicle. A dirty airflow sensor will degrade fuel efficiently, leading to a rough idle and even stalling as the problem progresses.

Misaligned tires

Tires that are low or out of alignment can lead to a drop in fuel efficiency. Checking the tire pressure and having the alignment checked regularly can help prevent this problem.

Defective Fuel Pump

Fuel delivery issues can drastically affect fuel efficiency. The fuel pump pulls the fuel from the gas tank to the fuel injectors. As a result, the fuel pump can become clogged or malfunction. A bad fuel pump can lead to a rough running engine because it is not getting enough fuel. This will lead to a decline in gas mileage. If this issue is not addressed, it will lead to rough, idle, sputtering, and stalling.

Clogged Fuel Filter

A clogged fuel filter will also cause problems with gas mileage. This is because the fuel filter screens out contaminants in the fuel, and it will become clogged over time. Therefore, fuel filters need to be replaced periodically.

Stuck Brake Caliper

A stuck caliper on a disc brake or a stuck shoe on a drum brake can lead to a serious decline in gas mileage. In addition, any brake issue can make the vehicle dangerous to drive. If the decline in efficiency is accompanied by the vehicle pulling to one side, the brake system should be inspected immediately.

2018 Toyota highlander hybrid digital speedometer not working

Knowing the appropriate speed at which to drive is important to all drivers from a safety and practical standpoint. A non-functioning speedometer increases the risk of driving too slow or too fast, potentially increasing the chance of an accident or citation from a police officer. Therefore, a functioning speedometer is essential for safe driving, and if you notice yours is not working properly, you should have it checked by a mechanic.

How this system works:

Your vehicle’s speedometer calculates the vehicle’s speed through interaction with the transmission and driveshaft. Your car’s computer can translate the rotational speed of the driveshaft into the linear speed of your vehicle, transmitted to you, the driver, through the speedometer. A speedometer that is not working fails to translate this information and can be a potential risk to drivers.

Common reasons for this to happen:

Broken Speed Sensor

A speed sensor has many purposes, including indicating the vehicle’s speed, regulating the flow of fuel and ignition timing, and operating the cruise control. A speed sensor that has failed may stop the speedometer from working.

You may also notice that your vehicle is not running smoothly, and you cannot use the vehicle’s cruise control. When speed sensors fail, they will typically cause the Check Engine light to come on, indicating that there is an issue.

Faulty Fuse/Bad Wiring

In very wet conditions, exposed wires can get wet and short out, causing a fuse to blow. When the fuse for your speedometer stops working, it can cause the speedometer to drop to zero.

Malfunctioning ECU

The engine control unit (ECU) acts as the vehicle’s computerized brain, monitoring many facets of vehicle activity, including speed. If there is a problem with the ECU, it may affect the vehicle’s ability to identify its traveling speed, and the speedometer will drop to zero.

What to expect:

A top-rated mobile mechanic will come to your home or office to determine why your vehicle’s speedometer has stopped working. The mechanic will then provide a detailed inspection report outlining the reason the speedometer stopped and the cost of any repairs that need to be made.

How it’s done:

A mechanic will first examine the vehicle using a code reader/scanner to review any error codes or Check the Engine light the vehicle may have produced. Then, by connecting to the vehicle’s ECU, the mechanic can better understand what components may have failed.

If the mechanic believes that the speed sensor has failed, they will get underneath the vehicle to find the exact location of the sensor. Next, the mechanic will examine the sensor and the corresponding wires for any superficial damage to the unit. Finally, the mechanic will remove the old speed sensor and install the new one.

If the mechanic believes that a fuse or bad wire has caused the speedometer to stop working, they will begin by examining the fuse to check if it has been blown. If so, the mechanic will replace the fuse. The mechanic will also examine the wires running from the speedometer to the speed sensor to see if they have been damaged.

If there is a problem with the ECU, the mechanic will typically replace the entire ECU. Because resetting the unit may be a temporary fix, replacing the ECU is the only way to ensure that it works properly. When the mechanic installs the new ECU, they will turn the ignition key to the “Auxiliary” position. This will allow the new ECU to turn on and begin managing vehicle systems. When the vehicle is turned on, it should begin adjusting systems to run optimally.

In all repairs, a mechanic will clear any trouble codes that may have been produced by the vehicle’s ECU using a code reader/scanner. Then, before leaving, the mechanic will test drive the vehicle to ensure that all systems are working properly and the speedometer has resumed functionality.

Can You Still Drive Your Car If the Speedometer Doesn’t Work?

Technically speaking, driving a vehicle with a broken speedometer is possible. However, doing so is not recommended. Without an alternative solution at the ready, you will be unable to recognize the speed at which your vehicle travels.

This is dangerous and significantly increases the risk of being cited by law enforcement for a moving violation. Simply put, you are unlikely to get out of a speeding ticket just because your speedometer is not working.

In any event, a malfunctioning speedometer should be addressed at the first available opportunity.

How Much Does it Cost to Fix a Speedometer?

The cost of fixing a vehicle’s speedometer is highly variable and largely dependent upon the root cause of the failure. This cost also varies between DIY repair and repair at a shop or other repair facility.

The most common speedometer-related issue is that which pertains to speed sensor failure. Most shops charge between $100-$250 for in-house speed sensor replacement. However, DIY costs tend to be significantly less, as only the cost of the sensor itself will be absorbed. In many cases, a sensor of this nature can be purchased for as little as $25-$40.

If the issue at hand pertains to an instrument cluster failure, the repair cost can be significantly higher. Even a rebuilt instrument cluster can be quite pricey, often ranging from $200-$400 in total cost.

The price of a new speedometer/instrument cluster tends to be considerably higher. It might also be necessary to have a dealership program your vehicle’s new instrument cluster for an additional fee.

Toyota hybrid highlander tail lights not working

Below are common reasons why your Highlander’s tail lights are not working ;

Bad Tail Light Fuse

The fuse is the first thing to check when facing a faulty electrical component, especially when it comes to bad tail lights.

A fuse is a metal band inside a plastic container designed to break when the current flowing through it becomes too high. This protects other parts of the electrical system from becoming damaged.

There are generally two areas that contain fuses in a car.

• The fuse panel inside the cabin of the vehicle.

This is normally on the front passenger side, behind a plastic panel underneath the dash. However, in certain cars, it can be found on the side of the dash with the passenger side door opened all the way.

• The main fuse box is under the hood.

It’s a big black box that has a lot of wires attached to it. Once you take the cover off the top, you can access the fuses inside.

Each fuse controls a different electrical component, and its jobs should be listed on the cover you removed to access the fuses. If not, they can be identified using the owner’s manual or by looking up a year, make, model-specific diagram online.

Once the fuse that controls your tail lights is identified, it can be tested using a fuse tester, which will light up if the fuse is good. If it doesn’t light up, the fuse should be replaced with one of the same size and amperage. You can visually see a break in the metal wire inside a bad fuse on certain fuses.

Bad Tail Light Bulbs

If the fuses under the hood and inside the cab check out fine, the next culprit to look at are the tail lamp bulbs themselves. This generally involves removing the tail light cover, although some cars have an access panel where you can squeeze the bulb out of the lens.

The best way to identify a bad bulb is to remove it from the plug socket and closely inspect the filament. The filament is the wire inside the bulb that creates the illumination. A broken filament means no illumination, and you will need to replace it with a new bulb.

Socket Failure

Sometimes the socket the bulb gets plugged into can go bad. Usually, this is caused by corrosion, which is caused by moisture entering the socket. However, it can also fail due to the poor connection of the wires in the back.

If the bulb and fuse both check out well, check the socket’s condition while you have the bulb out of it. Look for any discoloration, like white, blue, or brown, and bent or broken pins.

It is also good to check the electrical current with a multimeter at the socket. No electricity reaching the pins means a failure somewhere up the electrical line.

Worn Out Wiring

If no electrical current reaches the socket and fuses have checked out well, there is probably a damaged or broken wire somewhere along the line.

At this point, you’ll need to obtain a wiring diagram and visually inspect the wires along the tail light circuit for broken wires or cracked insulation.

Be sure to check the body grounds coming off this circuit as well. A dirty, loose, or broken ground wire will also cause a failure in delivering electricity to the sockets.

Control Switch Failure

Another cause for tail lights not turning on is the switch that controls them. The headlight switch on the dash can also fail and should be checked if everything else has checked out well.

Normally, this switch turns on headlights, tail lights, and parking lights. However, this switch may have failed if all other parts of the tail light circuit are in proper working order. This can be pulled out from the dash and checked with a multimeter to verify it has failed.

Dirty or Bad Ambient Light Sensor

Many modern cars also have an ambient light sensor on the dash. This allows the vehicle’s computer to turn the head lights automatically and tail lights on and off according to how light or dark it is outside.

Some also turn off daytime running lights on newer vehicles. So if your parking lights and headlights don’t turn on, but your brake lights still do, this is the likely culprit.

If this sensor goes bad or gets too dirty, it cannot tell if it is light or dark outside and may not turn on the lights. But again, this would affect both the headlights and tail lights and could be easily tested by manually turning the headlight switch to the on position.

How much does a Rear light Inspection cost?

On average, a Toyota Highlander’s Rear lights are not working. Inspection costs $95 with $0 for parts and $95 for labor. Prices may vary depending on your location.

Rear or tail lights are an important safety feature on your vehicle, especially when driving at night or in bad weather. These lights let other drivers know where you are on the road and illuminate brighter to indicate when you are braking. However, when rear lights fail, it can be dangerous for you and other drivers and result in a citation from a police officer. Therefore, if you notice an issue with your rear lights, you should have them inspected immediately.

How this system works:

During the daytime, or when the headlights are off, rear lights only illuminate to indicate when a driver is braking. However, at night, or when the headlights are turned on, the rear lights constantly illuminate to let other drivers know where you are and illuminate brighter when braking.

Your rear lights are controlled through the same switch that controls the headlights. Power is channeled through a relay to the rear lights, illuminating them when the switch is engaged. A brake light switch, typically connected to the brake pedal, illuminates the brighter brake lights when the brake pedal is pressed.

Common reasons for this to happen:

Blown Fuse

A mechanic should expect the corresponding fuse for your rear lights as a first resort. When a fuse blows, it prevents the circuit from completing, preventing the rear lights from illuminating. Also, sometimes when a taillight lens cracks or breaks, it can allow moisture to enter the lens and cause a short circuit, blowing a fuse.

Burned Out Bulbs

If only one of your rear lights appears to be out, the cause is most likely a burned-out bulb. When the filament breaks inside a bulb, it cannot illuminate the gas inside the bulb. A burned-out bulb will not affect the circuit of the entire rear light system, and the other rear light should continue to function normally.

Bad relay

A relay transfers power from the battery to the lights themselves, but when a relay fails, the connection cannot be completed. A relay may also fail because it is not grounded properly. A wire not grounded properly cannot protect the circuit and provide an outlet for the excess charge that builds up. Therefore, a vehicle with a bad relay or ground may be unable to power its rear lights successfully.

Bad Brake Light Switch

If the rear lights illuminate normally but do not become brighter when braking, the brake light switch may not be functioning properly. The brake light switch circuit is completed when the brake pedal is pushed, but if the switch has been pushed out of place or is not connecting properly, the brake pedal may not be able to complete the circuit, meaning that the lights will not illuminate.

What to expect:

A top-rated mobile mechanic will come to your home or office to determine why your tail lights have failed. The mechanic will then provide a detailed inspection report outlining the nature of the failure and the cost of any repairs that need to be made

How it’s done:

When checking electric components on your vehicle, especially fuses and relays, the mechanic will bring a multimeter to help diagnose what specific component has failed. First, the mechanic will examine the back of the car for any superficial damage like broken tail light covers and loose or frayed wiring. If there is no superficial damage, the mechanic will then begin to examine the different components along the electrical circuit.

The mechanic will begin inspecting the various electrical components of the vehicle by looking at the fuses. If they suspect a blown a fuse, they will remove the corresponding fuse for the tail lights to see if it is blown. If so, the mechanic will replace it with a fuse appropriately rated for the amperage.

If only one of the tail lights appears out, the mechanic should check to see if the dim bulb is burned out. Over time, bulbs will eventually fail and need to be replaced. Next, the mechanic will check the filament in the dim bulb to see if it is broken. If so, they will replace the bad bulb with a new one.

If the bulbs and fuses are working properly, the mechanic will check the corresponding relay for the tail lights. Then, using a multimeter, the mechanic can check the resistance of the relay. If it is not functioning properly, the mechanic will replace it and rewire it to the existing connections.

If the taillights seem to be functioning properly, but the brake lights are not working, the mechanic should inspect the brake light switch. If the brake light switch is not responding to the brake pedal, the mechanic will remove the old switch, replacing it with a new one. The mechanic should then check to ensure the brake lights are working and responding to the new switch.

In the case of any repair, the mechanic will ensure that they complete the necessary repairs and ensure the functionality of your new components. If an issue with the taillights has triggered an error code, the mechanic will use a code reader/scanner to clear the code and its corresponding light.

Can you drive with the broken tail lights?

Tail and brake lights are designed to help other drivers see you on the road; if they are not working, you may be at an increased risk for an accident. A police officer may also cite you for not having functioning tail lights in the event you are pulled over. If you notice your tail lights have gone out or are not working properly, you should stop driving the car and have it inspected by a mechanic.

Toyota Highlander hybrid cruise control not working

The most common reasons a Toyota Highlander cruise control isn’t working are failed control module, sensor or switch issues, or throttle actuation problems.

Cruise Control in my Toyota highlander hybrids Is Not Working

Below are some reasons why cruise control is not working;

Damaged Mechanical Components

If you’re driving an older car, there’s a chance that the cruise control may be mechanical. Mechanical cruise control is a relatively simple system: a cable connects the throttle to a part known as the vacuum actuator. The actuator adjusts the cable depending on the cruise control’s setting. If the vacuum actuator is leaking, or if either component is damaged, the cruise control may not work.

A Blown Fuse

If your cruise control system is electronically controlled, it will have an associated fuse. If there’s an electrical problem, the fuse will fail to keep another wiring from getting damaged. Try replacing the fuse. If it solves the problem and the cruise control keeps working, that’s great! However, if the fuse blows again, deeper electrical problems may occur.

Damaged Speed Sensor

The speed sensor senses speed (specifically, how fast your vehicle travels). A damaged speed sensor may cause the cruise control not to work properly due to inaccurate readings. Since a damaged speed sensor can also cause problems with the speedometer, it should be fixed immediately.

Faulty Brake Pedal Switch

When you step on the brake pedal, the brake lights turn on. This is due to the brake pedal switch. In addition to causing trouble with the brake lights, a broken brake pedal switch can also cause the cruise control to stop working.

If the switch is damaged and your vehicle thinks the brake pedal is always depressed, it won’t let the cruise control turn on. In addition to being inconvenient, this can be dangerous. After all, drivers need to know when you’re braking and when you’re not.

Potential Fixes

Throttle Position Sensor Replacement

When the throttle position sensor fails, the engine’s computer tends to overcompensate with fuel, leading to black exhaust from the tailpipe. As a result, there is a strong possibility of engine misfires, and the check engine light will come on.

Throttle position sensors can also develop “dead spots” or certain places along the throttle curve where it doesn’t get a reading. When this happens, the above symptoms can occur but then stop when you further press or let off the gas pedal.

Vehicle Speed Sensor Replacement

When the vehicle speed sensor fails, or the wiring harness prevents signal transmission, the speedometer is the first thing that will stop functioning properly. This can be an intermittent issue where the speedometer only works occasionally, the speedometer may cease all function, or the speedometer may read erratically or incorrectly.

Also, the traction control and anti-lock brake warning lights specific to each vehicle may be illuminated, depending on the design of those systems. As a result, you may notice the vehicle hesitates to accelerate, cruise control will not function properly, and the vehicle may not shift through all the gears.

Wheel Speed Sensor Replacement

If a wheel speed sensor fails, the ABS, traction control system (TCS), and manufacturer-specific stability control system lights will illuminate, informing the driver that the systems are disabled. As a result, the vehicle will be more prone to tire slip, and normal driving patterns may need to be adjusted to correct the loss of computer control. In addition, on older vehicles, the speedometer can be affected, causing the check engine light illumination as well.

Cruise Control Actuator Replacement

If the cruise control refuses to turn on, the actuator could be at fault. Likewise, the problem could be a bad actuator if the cruise control stays on but does not maintain a consistent speed. In extreme cases, a malfunctioning actuator could cause the throttle to stick and prevent the vehicle from slowing down. These symptoms may point to a bad actuator. However, they may also point to other problems with cruise control and related systems.

Cruise Control Switch Replacement

The cruise control switch can cause complete failure of the cruise control feature, but in a lucky scenario, only partial functionality will be lost. This means that the cruise control may come on, but it will not increase in speed automatically, or the cancel button does not work, leading the driver to cancel cruise control with the foot brake. In addition, in some vehicles, the cruise control light may illuminate, or a warning message may be displayed due to a lack of functionality.

Cruise Control Module Replacement

A faulty cruise control module will deactivate cruise control settings. This is because a detected error in the cruise control system could lead to hazardous driving conditions so that the module will be disabled, and the cruise control system warning light will be displayed. Depending on the make and model, this will be a different message, and a warning light or message may be displayed on the driver instrument cluster.

Can you jumpstart a Toyota hybrid highlander?

Yes. However, the process of jumpstarting a hybrid isn’t quite the same as it is for other cars, which is why it’s extremely important to know how to handle it. If something goes wrong, it could be very dangerous for you and your vehicle.

How to Jump-Start a Hybrid Car

If you’re in a tight spot and need to jumpstart your hybrid to get it up and running again, be sure you know what you’re doing. First, both cars should be turned off, along with anything else that runs on electricity—your air conditioning, radio, and any GPS devices you have. Leaving any of those on during a jumpstart could risk damage from the surge of electricity.

Once you’re sure everything is off, open the hoods of both vehicles just like you would for any other jumpstart. Then, connect one end of your jumper cables to the positive terminal in your hybrid and connect the other end to the terminal of the same color in the other vehicle.

From there, things are a little different. You’re going to connect one end of the other cable to the negative terminal in the working vehicle. Where the other end goes will depend on the model of your hybrid, so consult your owner’s manual to locate the right spot.

Once the cables are properly connected, you should start the working vehicle and let it run for a little bit. After a few minutes, you can start your hybrid, and everything should run as normal. When you disconnect the cables, do so in the opposite order from when you connected them.

Toyota Highlander hybrid key not detected

Here are a few possible reasons for a car not detecting the key fob;

Dead Key Fob Battery

A bad battery in the key fob is most commonly the reason for a failure to send signals to the keyless entry system. If available, use the spare key fob to open the vehicle and start the ignition.

If the spare fob is unavailable, use the provided key embedded in the fob to unlock the door. To start the engine, check the owner’s manual for instructions to start your car when the key fob fails.

Using The Wrong Key

When in a hurry, it is not unusual for vehicle owners to grab the wrong car key. Every key fob is uniquely programmed and will not work on other vehicles. Re-check that the key used belongs to that particular car.

Faulty Or Damaged Key Fob

It is a possibility that the key fob itself is defective. Old or loose wiring, water damage, or programming issues prevent the car from locking and unlocking. Contact a certified locksmith to reprogram the key to the vehicle. 

An Issue With The Keyless Entry System Or Start Button

An antenna or wiring fault in the keyless entry system, software issues, a damaged circuit board, or a faulty start button are all possible culprits. Consider having the vehicle inspected for any repair needs.

Worn Out Car Battery

Sometimes, the problem is not with the key fob but with the car. For example, modern vehicle systems are demanding. As a result, they may cause the car battery to become weak or die, preventing it from responding to the key fob. Charge the battery and if it is old and worn-out, consider a replacement.

Vehicle Locks

The car door locks can also cause problems with the key fob.

Broken Contacts Or Misaligned Buttons

Check the key fob for stuck or broken buttons. They interfere with the key fob’s ability to operate efficiently and send correct signals. If you feel comfortable doing so, remove the fob and make the necessary adjustments. A professional locksmith may also be able to examine the key fob and fix the issue.

Radio Interference

Radio interference is a possible cause if the key fobs suddenly stop operating. In addition, wireless devices such as radar detectors and anti-theft alarms can interfere with the key fob signals by transmitting at the same frequency.

Most key fob issues have easy solutions. If the problem is not dead batteries, contact a professional locksmith to fix, replace, or reprogram the key fob or have a duplicate key made to avoid car lockouts.

Solutions to start the engine

If your car doesn’t detect the key fob, the easiest solution is to use the physical backup key instead. Some cars can use either method to unlock the doors and start the engine. Unfortunately, most cars with push-button start don’t use a physical key to start the ignition, so you may be stranded somewhere without a way to get the car running.

Try any or all of these solutions to start your car:

• Check the owner’s manual to see if the automaker installed a backup solution for starting the car if the key dies.
• Look for a hidden slot near the steering column that might not be obvious initially.
• Press the start button on the key. Some cars can still detect dead key fobs this way in emergencies.
• If it’s a cold day, go indoors and warm up the key fob with your breath. Sometimes, the temperature can mess with the electronics.
• If you have a second key fob, try using it. This should show you if the problem is the key or the car.
• Replace the battery in the key fob with a new one (use a coin or screwdriver to pop it open).

If all else fails, you can have your car towed to a service center specializing in your car’s brand so they can diagnose the problem and potentially program a new key fob.

How to Open a Toyota Key Fob

If your Toyota key fob suddenly stops working, you most likely need a battery replacement. You’ll have to learn how to open a Toyota key fob to access the battery and replace it. In newer Toyota models, you can open a Toyota key fob by removing the hidden metal key and inserting it into a slot specifically meant to open the case.

On older Toyota remotes, you’ll need to insert a tool like a flat-blade screwdriver, a penny, or a paperclip into the notch at the bottom of your key fob. Turn your tool clockwise until it pops open, then follow the instructions below:

Lift the circuit board to reveal the battery after you’ve opened the case.

Take a note (or a picture) of what kind of battery it is and how it sits in the case. For example, most Toyota key fobs use a CR2032 battery. These batteries are widely available in Lakeland stores and online.

Once you have a battery replacement, use your notes or picture to properly place the battery inside of your key fob and close it, snapping the case back together. 

Test your key fob to make sure it’s working properly. If your vehicle doesn’t respond, open the case again and readjust the battery, ensuring the connections are clean and they’re making contact with the battery. If the key fob still doesn’t work, you may need to reprogram your Toyota key fob.

Toyota Key Fob Programming Process

Suppose you’ve recently purchased a new Toyota or a Toyota key replacement or duplicate. In that case, you’ll need to perform the Toyota key fob programming to get it properly synced to your vehicle. Here are the steps for a successful Toyota key fob programming;

• Get into the driver’s seat of your Toyota. Ensure all the doors are closed.
• Turn your key in the ignition from “off” to “on.”
• Turn your key in the ignition from “off” to “on again within five seconds.
• Remove your key from the ignition.
• Within 40 seconds, close and open the driver’s door twice.
• Insert and remove the key from the ignition one more time.

You should do this within 40 seconds. Your door locks will engage to indicate a successful Toyota key fob programming.

Toyota Highlander hybrid trunk not closing

Check the glass window on the trunk. Some Toyota Highlander models have a glass window on the trunk door that you can open separately. However, if this glass window is open or unlocked—or only slightly ajar—the trunk door will no longer respond to the key fob or even the buttons that open or close the trunk.

Some models of Toyota Highlander have a rear glass window on the trunk door that opens through the key fob or a separate button from inside. There is also a manual button outside to open the glass window close to the button for opening the trunk. Unfortunately, the proximity of the two buttons—albeit on different surfaces—can easily unlock the window accidentally.

Locking the movement of the trunk door while the glass window is open is a safety feature to prevent opening the trunk while the glass window is open. The glass window can accidentally open and hit the roof of your car—scratching or breaking it—if the trunk door moves upward and you did not lock the window yet.

Not all Toyota Highlander trims and year models have the feature where you can open the trunk window separately. Instead, lock the window securely to the trunk door, and the trunk door should be able to move once more to open and close.

Additionally, if your Highlander’s glass window is working appropriately -or your model does not have an opening rear window- you can check these additional areas to remedy the trunk closing:

Trunk Button at Glove Compartment

Check the trunk button in the glove compartment. This button also suspends the movement of the trunk door. This button is located on the left side of the glove compartment. You can only see it when you fully open the glove compartment.

When this button is pressed, the trunk door will work normally. However, the trunk will not work as expected if this button is not pressed. This is a good first step to check if you do not have a glass window on your trunk door that opens separately, yet you still cannot close the trunk door. Next, press the button and check if the trunk door will not respond to the key fob to close.

Debris On the Latch

If your Toyota Highlander doesn’t have a trunk window, but you cannot close the trunk door, then there could be big enough debris to block the latch. This could be a small pebble or stone.

Check the trunk’s latch for any debris that could be blocking the latch from getting a good grip on the lock. Also, check the locking mechanism under the trunk door for anything that prevents it from getting into the lock cavity.

Remove anything that you find there. Sometimes, kids could be playing around the car and might’ve left a small toy that found its way into the lock cavity.

Worn Out Latch

The latch of the trunk door can wear out faster than most other parts of your Toyota Highlander—especially if you open and close it a lot. In addition, the latch experiences a lot of friction whenever it locks the trunk door. This is because it rubs against the other latch to lock the door.

Inspect both locking components for any signs of wear. For example, the trunk door of your Toyota Highlander could be moving down to close, but the latch is no longer sufficient to hold the trunk door in place.

If you see any visible wear on the latch, have it checked by a mechanic if this is preventing your trunk door from getting a good grip to lock. Or it might be causing intermittent locking when you try to close the trunk door.

Dirt On the Sensor

Another safety feature of your Toyota Highlander is a small sensor under the trunk door. This sensor aims to detect objects like groceries, pets, people, or even body parts like children’s fingers.

The trunk door will stop moving down to close or open if the sensor detects something in its path that it could hit, damage, or injure. Similarly, if the sensor is dirty, it could assume something is in its path and stop responding to the command to go down and close the trunk door.

Gently wipe the bottom of the trunk door with a clean cloth damp with warm water. A warm cloth will help loosen any grease or oil-based dirt and make removing it easier.

Dirty Hydraulic Arms

Your Toyota Highlander closes its trunk door by controlling the air pressure on two hydraulic arms that lifts or lowers the trunk door. Unfortunately, if these arms are dirty or no longer well lubricated, they might no longer be able to generate the right amount of force to pull the trunk door down to close.

You can find these hydraulic arms on the edges of the trunk door on both sides. Inspect them for dirt and debris that could prevent them from closing the trunk door.

Check for signs that these arms are no longer well lubricated.

If you think these arms might be the culprit, have them inspected by a mechanic.

Wiring Issue

Loose wiring can cause the trunk door to lose power intermittently. It could work one minute and then be unable to close your trunk door the next. Check the wiring along with the trunk door for any scratches or damage. Scratches on the wires could be a sign that there is a connectivity problem inside.

Sometimes the wires could have fallen off the hooks that keep them in place. If this happens, the closing motion of your trunk door could be damaging them little by little.

Aside from checking for damage, check if the wires are where they should be. Make sure they are not getting in the way of the movement of the trunk door.

Rear Liftgate Is Open and Not Moving

Another problem happens when the vehicle’s liftgate is in the open position. It does not want to close. This can be a problem if you are on the road and trying to get back home. Here’s what to do to fix this problem.

• Locate the close button on the rear liftgate door. It is only accessible in the liftgate door jamb when the liftgate is in the open position.
• Press and hold that button for a few seconds. You should hear it beep about four times.
• Release your finger.
• Then, press the button again quickly to signal to close the door. This should fix the problem and allow it to close normally.

Are highlander hybrids reliable?

The 2022 Toyota Highlander Hybrid has a predicted reliability score of 82 out of 100. A J.D. Power predicted reliability score of 91-100 is considered the Best, 81-90 is Great, 70-80 is Average, and 0-69 is Fair and considered below average.

Is the Toyota hybrid highlander worth buying?

Yes. The Toyota Highlander Hybrid should last at least 200,000 miles and can even last over 300,000 miles with routine maintenance and conservative driving habits. If you drive 15,000 miles per year, you can expect 20 years of reliable service from your Highlander before repair costs become too expensive. This most certainly makes it a worthy investment.