Engine Compartment Noise at Idle
Unusual noise from the engine compartment of a 2020 Ford Explorer at idle may indicate issues with accessory belts, pulleys, or the serpentine belt tensioner. It could also be related to the cooling fan or a failing alternator bearing.
Diagnosis Details
Possible Causes
Worn or loose serpentine belt causing squealing or chirping noise at idle.
Failing idler pulley or tensioner bearing producing a grinding or rattling sound.
Cooling fan clutch or electric fan motor issue causing noise when engine is at idle.
Alternator bearing failure creating a whining or growling noise.
Related OBD-II Codes
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What You Should Do
Inspect the serpentine belt for cracks, glazing, or looseness.
Check all pulleys and the tensioner for play or roughness.
Listen for noise changes when turning the steering wheel or turning on the A/C.
If noise persists, have a mechanic perform a stethoscope check on the alternator and cooling fan.
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.
