Sweet Smell from Vehicle – Possible Coolant Leak
A sweet smell while driving or after parking in a 2020 Toyota RAV4 is a classic sign of a coolant leak. The sweet odor is typically caused by ethylene glycol-based antifreeze escaping from the cooling system, which 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 (often produces sweet smell inside cabin when using heat)
Leaking radiator cap or overflow tank
Related OBD-II Codes
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What You Should Do
Check coolant level in the reservoir and radiator (when cool).
Look for puddles under the vehicle, especially near the front.
Inspect hoses, radiator, and water pump for visible leaks.
If the smell is inside the cabin, the heater core may be leaking.
Do not drive if the engine is overheating.
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.
