How do I address a malfunctioning tire pressure sensor in my 2020 Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes

2-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

598 words

Problem Statement

Learn how to diagnose and repair a malfunctioning tire pressure sensor in your 2020 Toyota Highlander with our step-by-step guide.

Affected Component

Tire Pressure Monitoring System (TPMS)

Estimated Time

2-3 hours

Symptoms

•Warning Light: The tire pressure warning light on the dashboard is illuminated.
•Inaccurate Readings: The tire pressure readings displayed may be incorrect or show dashes (---).
•Fluctuating Readings: The tire pressure may fluctuate unexpectedly when monitored.
•No Response: The system does not respond when tires are inflated or deflated.

Diagnostic Steps

1
Visually Inspect Tires: Check for visible damage or punctures in the tires and ensure that all tires are properly inflated to the recommended pressure.
2
Check Sensor Status with OBD-II Scanner: Connect an OBD-II scanner to the diagnostic port, navigate to the TPMS section, and check for any stored trouble codes.
3
Reset the TPMS: Turn the vehicle ignition to the 'ON' position, press and hold the TPMS reset button, release after the TPMS light blinks three times, and turn the ignition off and back on.
4
Inspect the Sensors: Inspect each tire’s valve stem for corrosion or damage and check the signal from each tire sensor using a TPMS tool.

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

•OBD-II Scanner
•Tire Pressure Gauge
•TPMS Tool (optional but recommended)
•Jack and Jack Stands
•Tire Iron
•Torque Wrench
•Replacement Tire Pressure Sensors (if needed)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Symptoms

•Warning Light: The tire pressure warning light on the dashboard is illuminated.

•Inaccurate Readings: The tire pressure readings displayed may be incorrect or show dashes (---).

•Fluctuating Readings: The tire pressure may fluctuate unexpectedly when monitored.

•No Response: The system does not respond when tires are inflated or deflated.

Diagnostic Steps

1
Visually Inspect Tires: Check for visible damage or punctures in the tires and ensure that all tires are properly inflated to the recommended pressure.
2
Check Sensor Status with OBD-II Scanner: Connect an OBD-II scanner to the diagnostic port, navigate to the TPMS section, and check for any stored trouble codes.
3
Reset the TPMS: Turn the vehicle ignition to the 'ON' position, press and hold the TPMS reset button, release after the TPMS light blinks three times, and turn the ignition off and back on.
4
Inspect the Sensors: Inspect each tire’s valve stem for corrosion or damage and check the signal from each tire sensor using a TPMS tool.

Solution

Addressing a Malfunctioning Tire Pressure Sensor in a 2020 Toyota Highlander

Tools Required

OBD-II Scanner
Tire Pressure Gauge
TPMS Tool (optional but recommended)
Jack and Jack Stands
Tire Iron
Torque Wrench
Replacement Tire Pressure Sensors (if needed)

Repair Instructions

Step 1: Check Tire Pressure

Remove the valve cap from each tire.
Use a tire pressure gauge to check the pressure of each tire.
Inflate or deflate tires to the manufacturer’s recommended pressure (found on the driver’s door jamb).

Step 2: Reset the TPMS Light

With the ignition in the “ON” position (engine off), press and hold the TPMS reset button until the TPMS light blinks three times.
Turn the ignition to the “OFF” position and then back to “ON.”
Drive the vehicle for at least 10 minutes to allow the system to recalibrate.

Step 3: Inspect and Replace Sensors

If the TPMS light remains illuminated after resetting, jack up the vehicle and remove the wheel(s) if necessary.
Remove the tire from the wheel using a tire iron and jack stands.
Locate the tire pressure sensor inside the tire valve stem.
If the sensor is damaged or corroded, carefully unscrew it from the valve stem and replace it with a new sensor. Ensure that the new sensor is compatible with the Highlander’s system.
Reinstall the tire onto the wheel and ensure it is properly seated.
Inflate the tire to the recommended pressure, ensuring the replacement sensor is functioning correctly.

Step 4: Recheck System Functionality

Reinstall the wheel onto the vehicle and lower it back to the ground.
Recheck the TPMS light after driving the vehicle for a short distance.
If the light remains on, you may need to recheck the wiring or consult with a professional.

Conclusion

If these steps do not resolve the issue, it is advisable to visit a certified Toyota service center for further diagnosis. They have specialized tools and knowledge to address deeper issues within the TPMS. Always ensure that tire maintenance is performed regularly to avoid future complications.