My Subaru Outback is making a buzzing/humming noise. What could it be?

Asked by i1meanmama Mar 30, 2014 at 02:41 PM about the 2007 Subaru Outback

Question type: Maintenance & Repair

5 Answers
10,535

Nick answered 10 years ago

Gonna need more info than this or I could spit out ideas all day.

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3,315

Keith answered 10 years ago

I am not sure if this is your issues ""It's the fuel evaporation leakage system doing a check. It turns on 5 to 10 hours after the engine is turned off. It's on page 9 of the '13 Outback manual""

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3,315

Keith answered 10 years ago

it sounds like the evap canister, It does a vacuum pressure check. The car does this occasionally

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2014KHOO answered 10 years ago

Try to check the vacuum sensor "o" ring joint for leakage. due to ageing. I tried on mine, clean the throttle body at the same time. I added sealant around the mating "o" ring. Suddenly the system went quiet and buzzy from the steering hydraulic went. Hopw you might find this helpful..enjoy

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