Troubleshooting Guide: Common TPMS Issues in Heavy Trucks

Tire Pressure Monitoring Systems (TPMS) are vital for maintaining safety and efficiency, especially in heavy trucks. Here's a guide to common issues and solutions:

1. Problem:  TPMS warning light is illuminated, but tires appear properly inflated.
   Possible Causes:
   Solutions:

• Sensor Check: Use a TPMS diagnostic tool to check each sensor's status and battery level. Replace faulty sensors like the ACDelco 23445327 with genuine parts for guaranteed compatibility.

• Receiver Diagnosis: Have the vehicle's TPMS receiver diagnosed by a qualified technician.

• Rule out Interference:  If interference is suspected, try relocating the vehicle away from potential sources of strong RF signals and see if the warning light clears.

• Sensor Malfunction: The TPMS sensor itself may be faulty due to age, damage, or battery depletion.

• Receiver Issue:  The vehicle's TPMS receiver might be malfunctioning, unable to read sensor signals.

• Interference:  Strong radio frequency interference can sometimes disrupt TPMS signals.

2. Problem:  TPMS warning light flashes intermittently.
   Possible Causes:
   Solutions:

• Check Tire Pressure:  Immediately check and inflate all tires to the recommended pressure.

• Sensor Re-check: If pressure is correct, re-scan sensors with a TPMS tool to ensure proper communication.

• Low Tire Pressure:  Even a slight drop in tire pressure can trigger the warning, especially in cold weather.

• Sensor Signal Loss:  Temporary signal loss from a sensor can cause intermittent warnings.

3. Problem:  Cannot program new TPMS sensors after replacement.
   Possible Causes:
   Solutions:

• Verify Sensor Compatibility: Always use GM Original Equipment or verified compatible sensors like ACDelco 23445327.

• Follow Correct Relearn Procedure: Consult the vehicle's service manual for the precise TPMS relearn procedure and follow it meticulously.

• Incorrect Sensor Type: Using non-compatible or aftermarket sensors.

• Programming Procedure Error:  Incorrect TPMS relearn procedure being followed.