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Humming noise from rear when car off

  

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2020 Toyota Corolla SE (2.0) 64,200 miles. I notice sometimes there is a humming noise coming from the rear when car is off. It can be after the car has been sitting for a few hours or more. Not real loud, but noticeable, and pretty random. When I hear it, I hop into car, turn key to run position (not start), and noise stops immediately. I take key out and the noise stays away. Any ideas on what this is?


1 Answer
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Your evap system may be purging vapors but you'd need to check with a Toyota mechanic to be certain.


Thanks


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