Tesla Model Y 2021 - No Sound When Starting
The vehicle occasionally fails to start with no audible sound, indicating a potential issue with the high-voltage battery, 12V auxiliary battery, or the starting system. This is critical for an EV as it may leave the driver stranded.
Diagnosis Details
Possible Causes
12V auxiliary battery failure or low charge
High-voltage battery contactor or BMS fault
Faulty DC-DC converter or charging system issue
Related OBD-II Codes
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What You Should Do
Check 12V battery voltage (should be >12.4V).
If low, jump-start the 12V system or replace the battery.
If 12V is good, perform a hard reset (hold both scroll wheels and brake pedal for 10 seconds).
If issue persists, schedule service for high-voltage system 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.