Coolant Leak Diagnosis
A sweet smell while driving or after parking in a 2020 Nissan Rogue 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
Leaking radiator or coolant hose
Faulty heater core (leak inside cabin)
Cracked expansion tank or loose radiator cap
Related OBD-II Codes
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What You Should Do
Check coolant level in the reservoir and radiator (when engine is cool).
Inspect under the hood and under the car for puddles or wet spots on hoses, radiator, and around the water pump.
If the smell is inside the cabin, the heater core may be leaking.
Do not drive if the coolant level is low or if the engine temperature gauge rises above normal.
Have the cooling system pressure tested by a mechanic.
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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.
