Tire Pressure Monitoring System (TPMS) Warning Light Always On
The TPMS light is constantly illuminated on a 2019 Nissan Altima, indicating that one or more tires have low pressure or the system has a fault. This can affect tire wear, fuel economy, and safety.
Diagnosis Details
Possible Causes
One or more tires are underinflated (below the recommended pressure, typically 32-35 psi).
TPMS sensor battery failure or sensor malfunction (common after 5-7 years).
Faulty TPMS receiver module or wiring issue.
Related OBD-II Codes
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What You Should Do
Check and adjust tire pressures to the recommended level (found on driver's door jamb sticker).
If the light remains on after driving a few miles, have the TPMS system diagnosed with a scan tool to identify the faulty sensor or module.
Estimated Repair Cost
$0 (checking pressure) to $50-$100 per sensor replacement, plus labor; module replacement $200-$400
Typical range: $50 – $100
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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.