Rotten Egg Smell During Acceleration in Tesla Model Y
A rotten egg smell when accelerating in a 2021 Tesla Model Y typically indicates a failing high-voltage battery cell or a malfunctioning battery management system, causing hydrogen sulfide gas release. This is a serious safety concern that requires immediate attention.
Diagnosis Details
Possible Causes
Internal battery cell failure or thermal runaway in the high-voltage battery pack, leading to electrolyte decomposition and hydrogen sulfide gas.
Faulty battery management system (BMS) or overcharging condition causing battery stress.
Contaminated or degraded coolant in the battery thermal management system, producing sulfur-like odors.
Related OBD-II Codes
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What You Should Do
Stop driving immediately and park the vehicle in a well-ventilated area away from buildings or other vehicles.
Do not attempt to charge the car.
Contact Tesla Roadside Assistance or a certified Tesla service center for immediate inspection and diagnosis.
Do not open the battery pack yourself.
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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.