Sweet Smell from Engine or Cabin – Possible Coolant Leak
A sweet smell while driving or after parking in a 2020 Honda CR-V typically indicates a coolant leak. The sweet odor is characteristic of ethylene glycol-based antifreeze. 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 (sweet smell inside cabin, often with foggy windows)
Overflow reservoir cap loose or damaged
Related OBD-II Codes
Not satisfied with this diagnosis?
Try Another DiagnosisWhat To Do Next
What You Should Do
Check coolant level in the reservoir and radiator (when engine is cold).
Look for visible leaks under the vehicle or around the engine bay.
If the smell is inside the cabin, inspect for wet carpet on the passenger side (heater core leak).
Do not drive if the engine is overheating.
Have the cooling system pressure tested by a mechanic.
Share this diagnosis
Help others with similar symptoms
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.
