Sweet Smell from Engine or Cabin – Possible Coolant Leak
A sweet smell while driving or after parking in a 2020 Ford F-150 typically indicates a coolant leak. The ethylene glycol in antifreeze has a distinct sweet odor. This can be caused by a failing water pump, radiator, heater core, or a loose hose. If the leak is significant, it can lead to engine overheating and serious damage.
Diagnosis Details
Possible Causes
Coolant leak from water pump, radiator, or heater core
Leaking heater core (sweet smell inside cabin)
Loose or cracked coolant hose
Related OBD-II Codes
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What You Should Do
Check coolant level in the reservoir when engine is cold.
Look for puddles under the vehicle (often green, orange, or pink).
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 temperature rises above normal.
Top off coolant with the correct type (check owner's manual) and visit a mechanic for pressure testing and repair.
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.
