High pitch whistle that never stops.

2008 Ford Fusion 1.4 petrol Durashift
Problem added: Nov 7, 2023 (4 weeks ago)
Car: Ford Fusion
Year: 2008
Variant: 1.4 petrol Durashift
Problem Categories
Electrics, ECU, Warnings & Lights
Leaks & Noises
The car (UK estate model) has a high pitched whistle that is louder inside than outside. Fuses are ok and there are no error codes. but due to hearing loss I can't narrow down the location. I presume it's a sensor of some kind, but it's not in the handbook or my Haynes manual. Any advice appreciated please.


Hard to really advise without a lot more info but USUALLY whistle you describe would be caused by turbo whistle or air leak , hose / pipe leak but dont think you have a turbo on that version . Could also check the PCV valve / hose , air intake hose

Answered Nov 7, 2023 (4 weeks ago)
No, there's no Turbo on it. But thanks for the idea and the link. I'll check that.
Answered Nov 7, 2023 (4 weeks ago)

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