Tire Pressure Monitoring System (TPMS) Warning Light Always On
The tire pressure warning light is constantly illuminated on a 2020 Tesla Model 3, indicating one or more tires have low pressure or the TPMS sensor has a fault.
Diagnosis Details
Possible Causes
One or more tires are significantly under-inflated (below the recommended pressure, typically 38-42 psi for this vehicle).
TPMS sensor battery failure or sensor damage, common after 4-6 years of use.
TPMS system malfunction or receiver module issue, or aftermarket tire/wheel changes without sensor reset.
Related OBD-II Codes
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What You Should Do
Check and adjust tire pressures to the recommended levels (found on driver's door jamb sticker).
If light remains on after inflation, inspect for punctures or leaks.
If no leaks, the TPMS sensor may need replacement.
A Tesla service center or tire shop can diagnose and replace faulty sensors.
Estimated Repair Cost
$0 (if only air needed) to $50-$100 per sensor for replacement, plus labor ($100-$200 total for all four sensors).
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.