Sweet Smell from Engine or Cabin
A sweet smell while driving or after parking typically indicates a coolant leak. Coolant contains ethylene glycol, which has a sweet odor. This can lead to engine overheating and serious damage if not addressed promptly.
Diagnosis Details
Possible Causes
Coolant leak from radiator, hoses, water pump, or heater core
Heater core leak (smell may be stronger inside cabin)
Overflow reservoir cap loose or faulty
Related OBD-II Codes
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What You Should Do
Check coolant level in the reservoir and radiator (when engine is cool).
Look for puddles under the car, especially near the front.
Inspect hoses, radiator, and water pump for leaks.
If the smell is inside the cabin, the heater core may be leaking.
Do not drive if coolant level is low or engine temperature rises above normal.
Have the cooling system inspected and repaired by a professional.
Related Repairs
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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.
