Why does my 2020 Toyota Highlander’s tire pressure light keep coming on?

Toyota Highlander Fourth Generation (2020-present)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

4 min read

601 words

Problem Statement

Learn how to diagnose and fix the tire pressure light issue on your 2020 Toyota Highlander with our step-by-step guide.

Affected Component

Tire Pressure Monitoring System (TPMS)

Estimated Time

1-2 hours

Symptoms

•Tire pressure warning light illuminated on the dashboard
•Possible noticeable changes in vehicle handling
•Tire pressure may be lower than recommended

Diagnostic Steps

1
Visually inspect all four tires for any obvious signs of damage
2
Check the sidewalls for bulges or cracks
3
Look for any objects lodged in the tread
4
Use a reliable tire pressure gauge to measure the pressure in all four tires
5
Compare the readings against the manufacturer-recommended tire pressures
6
Check the spare tire for TPMS sensor issues
7
Consider temperature influence on tire pressure
8
Check TPMS sensors for malfunctioning or damage
9
Check battery status of TPMS sensors

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Tire pressure gauge
•OBD-II scanner (with TPMS functionality)
•Tire inflator or compressor
•Torque wrench
•Tire patch kit or replacement tire

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Diagnostic Steps

1
Visually inspect all four tires for any obvious signs of damage
2
Check the sidewalls for bulges or cracks
3
Look for any objects lodged in the tread
4
Use a reliable tire pressure gauge to measure the pressure in all four tires
5
Compare the readings against the manufacturer-recommended tire pressures
6
Check the spare tire for TPMS sensor issues
7
Consider temperature influence on tire pressure
8
Check TPMS sensors for malfunctioning or damage
9
Check battery status of TPMS sensors

Solution

Issue: Tire Pressure Light Keeps Coming On

Tools Required:

Tire pressure gauge
OBD-II scanner (with TPMS functionality)
Tire inflator or compressor
Torque wrench (if tires need to be removed or replaced)
Tire patch kit or replacement tire (if necessary)

Repair Instructions:

Step 1: Adjust Tire Pressures

If any tire pressure is low, inflate the tire(s) to the recommended PSI using a tire inflator.
After inflation, check the pressure again to ensure it is correct.

Step 2: Reset TPMS (if applicable)

If you have inflated the tires and the light remains on, you may need to reset the TPMS system.
Locate the TPMS reset button (usually found under the steering wheel or in the glove compartment).
Turn the ignition to the "ON" position without starting the engine.
Press and hold the TPMS reset button until the TPMS light blinks three times and then goes off. This may take about 3 seconds.
Start the engine and wait for a few minutes to see if the light turns off.

Step 3: Inspect and Replace TPMS Sensors

If the tire pressures are correct and the light does not reset, inspect the TPMS sensors:
- Remove the wheel where the TPMS sensor is suspected to be faulty.
- Replace the sensor battery or the sensor itself if it is confirmed to be malfunctioning.
- Reinstall the tire and torque the lug nuts to the manufacturer specification.

Step 4: Recheck the System

Once repairs or adjustments are made, drive the vehicle for a short distance (typically 10-15 minutes) and check if the tire pressure light goes out.

Conclusion:

If after all these steps the tire pressure light continues to illuminate, it may be time to consult a professional technician or visit a Toyota dealership for further diagnosis, as there may be a more complex issue with the TPMS system or wiring that requires specialized tools and expertise.