2013 Volvo S60 whines after I shut it off



After I pull into my garage and shut off the engine, I usually hear a high pitch whine coming from the engine compartment. I thought it was the cooling fan motor but my mechanic inspected and didn’t find the fan defective. Does any other s60 owner have this problem?


A worned belt could do this.


Listen for it at the gas cap. It could be the evaporative emissions system. It may be OK.