Tire Pressure Monitoring System (TPMS) Warning Light Always On
The tire pressure monitoring system (TPMS) warning light is continuously illuminated on the dashboard of a 2021 Tesla Model Y. This indicates that one or more tires have low pressure, or there is a fault in the TPMS system.
Diagnosis Details
Possible Causes
One or more tires are underinflated due to a slow leak, temperature drop, or normal pressure loss.
TPMS sensor battery failure or sensor malfunction, common after several years of use.
TPMS system fault after tire rotation or replacement without resetting the system.
Related OBD-II Codes
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What You Should Do
Check and adjust tire pressures to the recommended values (typically 42 psi cold for Model Y).
If the light remains on after inflation, inspect for visible punctures or damage.
Use the Tesla touchscreen to reset the TPMS via Controls > Service > Tire Pressure Monitor.
If the light persists, schedule a service appointment for sensor diagnosis.
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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.