Humming noise from rear of car when parked in garage

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by phickson, Jan 6, 2013.

  1. phickson

    phickson Tron Pod Occupier

    Joined:
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    Location:
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    Vehicle:
    2012 Prius
    Model:
    Four
    Got home from work the other day, shut down my 2012 Prius 4 and went into the house. A couple of hours later went into the garage to drop a trash bag and heard a humming/whirling sound from the garage. Walked around the Prius and isolated it coming from the bottom rear of the car. Went and got key, turned the car on, then off again and the noise ceased.

    Anyone have an idea what that was? Fuel pump maybe? And why did this occur?
     
    #1 phickson, Jan 6, 2013
    eswilson likes this.
  2. Paradox

    Paradox Prius Enthusiast / Moderator
    Staff Member

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    Vehicle:
    2014 Prius v wagon
    Model:
    Five
    It's normal, it's the fuel evaporation leakage check and is mentioned in the manual... Enjoy your Prius :)

    Found this right here on Priuschat:



    http://priuschat.com/forums/gen-ii-prius-main-forum/73381-car-off-but-noise-coming-near-back-passenger-tire.html\
     
    #2 Paradox, Jan 6, 2013
    eswilson and phickson like this.
  3. Miata Racer

    Miata Racer Junior Member

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    I had a '99 Jeep Cherokee that made the exact same noise, even a day after being parked. Never ran the battery down, and I never found out what it was....
     
    #3 Miata Racer, Jan 12, 2013
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