Coolant Leak Detected (Sweet Smell)
A sweet smell while driving or after parking in a Tesla Model 3 typically indicates a coolant leak. Coolant has a sweet, syrupy odor and can leak from the battery thermal management system, heater core, or coolant hoses. This can lead to overheating and potential battery damage if not addressed promptly.
Diagnosis Details
Possible Causes
Leaking coolant from the battery thermal management system or coolant hoses
Heater core leak inside the cabin (often accompanied by foggy windows or wet carpet)
Coolant reservoir cap not sealing properly or coolant overflow
Related OBD-II Codes
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What You Should Do
Check under the vehicle for puddles of colored fluid (usually pink or orange).
Inspect coolant reservoir level and look for visible leaks around hoses and the battery pack.
If the smell is inside the cabin, check for dampness under the dashboard.
Do not drive if coolant level is low or if you see significant leakage.
Schedule service immediately.
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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.
