Sweet Smell from Engine or Cabin While Driving or After Parking
A sweet smell in a 2019 Hyundai Elantra is typically caused by a coolant leak. The sweet odor is ethylene glycol, which is toxic and can lead to engine overheating if not addressed promptly.
Diagnosis Details
Possible Causes
Coolant leak from radiator, hoses, water pump, or heater core
Heater core leak (smell may be more noticeable inside cabin when using heat)
Overflow reservoir cap loose or damaged
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 and the water pump for leaks.
If the smell is inside the car, the heater core may be leaking.
Do not drive if coolant level is low or engine temperature rises.
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.
