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My truck was making a chirping noise and it sounded like a belt slipping but it was very faint (I could barely hear it over the engine). I ran the codes on my scanner and the only one that came up was P0528: fan speed sensor no signal.

I had my fan clutch replaced about a month ago due to it making noise and overheating. I replaced the faulty Ford radiator caps that all 6.0s and 6.4s have too. The noise wasnt there before the fan clutch got replaced and it has only started doing it in the last week or so. I am wondering if they could have knocked the sensor loose when the replaced the clutch or if it could have fried it when it overheated.

No coolant is puking out of the bottle and everything else is fine. The truck runs cool even on hot days but the noise is driving me INSANE.

Any help is appreciated. Thanks!
 
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