Tire Pressure Monitoring System (TPMS) Warning Light Always On
The TPMS warning light is constantly illuminated, indicating that one or more tires have low pressure or the system has a fault. This can affect handling, fuel economy, and tire wear.
Diagnosis Details
Possible Causes
One or more tires are underinflated due to a slow leak or seasonal temperature changes.
TPMS sensor battery failure or sensor damage, common after tire rotation or replacement.
Faulty TPMS control module or wiring issue, especially if all sensors are new.
Related OBD-II Codes
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What You Should Do
Check and adjust tire pressures to the recommended PSI (usually found on driver's door jamb).
If light remains on, have the TPMS system scanned with a diagnostic tool to identify the faulty sensor or module.
Reset the system if needed.
Estimated Repair Cost
$0 (checking pressures) to $50–$150 per sensor replacement; $200–$500 for module repair if needed.
Typical range: $50 – $150
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Disclaimer: This AI-generated diagnosis is for informational reference only. Always consult a qualified mechanic for an in-person inspection. AutOwner is not responsible for decisions made based on this information.