Wierd sound coming from underneath rear after parked in garage for six hours

Discussion in 'Gen 4 Prius Main Forum' started by jtg61, Feb 5, 2017.

  1. jtg61

    jtg61 Member

    Joined:
    Dec 5, 2016
    43
    42
    0
    Location:
    Ocala FL
    Vehicle:
    2016 Prius
    Model:
    Two
    I went into my garage about six hours after I parked my Prius and I head a weird humming sound coming from the rear of the vehicle where the Lithium Ion batteries are. It sounded like maybe a fan was running, I'm not sure. It just seemed really weird that anything would be running under the rear of the vehicle six hours after I parked it in the garage. Why would something be running on my Prius after it was parked for so long? Any ideas? Is it something I should be concerned about?
     
  2. alanclarkeau

    alanclarkeau Senior Member

    Joined:
    Feb 24, 2016
    5,803
    6,378
    0
    Location:
    near Brisbane, Australia
    Vehicle:
    2016 Prius
    Model:
    N/A
    No idea really - did you have your smart key in your pocket? And was the car locked?

    If I have the key in my pocket and walk past the car - if it's at night, I can see the interior light turn on. My hearing isn't real good - so I'm not sure about noise - but it sure knows I am there.
     
    RCO likes this.
  3. jtg61

    jtg61 Member

    Joined:
    Dec 5, 2016
    43
    42
    0
    Location:
    Ocala FL
    Vehicle:
    2016 Prius
    Model:
    Two
    No smart key in my pocket. I was in my garage getting beer out of the fridge when I hear the buzzing sound coming from underneath the rear of the car, like an inverter or fan was running hours after it was parked. Never heard this sound before.
     
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    86,159
    38,077
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    it's an evap check for pollution control. weirded me out the first time i heard it. can you say 'christine'?:sneaky:
     
    kithmo and jtg61 like this.
  5. jtg61

    jtg61 Member

    Joined:
    Dec 5, 2016
    43
    42
    0
    Location:
    Ocala FL
    Vehicle:
    2016 Prius
    Model:
    Two
    It runs this check hours after you've parked your vehicle? Very weird, but good to know it's normal. Thanks!
     
    RCO likes this.
  6. alanclarkeau

    alanclarkeau Senior Member

    Joined:
    Feb 24, 2016
    5,803
    6,378
    0
    Location:
    near Brisbane, Australia
    Vehicle:
    2016 Prius
    Model:
    N/A
    how long did it go for? Your fuel tank is different from ours here. Ours doesn't have the pressure lock or whatever it's called.
     
    RCO likes this.
  7. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    86,159
    38,077
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    right? not sure what the delay is for, maybe it's some kind of leak down test.
     
    RCO likes this.
  8. jtg61

    jtg61 Member

    Joined:
    Dec 5, 2016
    43
    42
    0
    Location:
    Ocala FL
    Vehicle:
    2016 Prius
    Model:
    Two
    It ran for about 5 minutes and then stopped. I've gone out to the garage periodically and haven't heard it since.
     
    RCO and alanclarkeau like this.
  9. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    86,159
    38,077
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    same here, you have to time it right. i've only heard it a few times in almost 5 years.
     
    RCO and jtg61 like this.
  10. Colin Jones

    Colin Jones Member

    Joined:
    Sep 13, 2014
    97
    170
    1
    Location:
    Aberdeen/UK
    Vehicle:
    2017 Prius
    Model:
    Business Edition
  11. ETP

    ETP 2019Prius(Limited),Highlander HYB Plat,B52-D,G,F,H

    Joined:
    Apr 12, 2009
    2,643
    1,109
    0
    Location:
    Auburdale FL
    Vehicle:
    2019 Prius
    Model:
    Limited
    It needs beer.
     
    Sooner Al likes this.
  12. kithmo

    kithmo Couch Potato

    Joined:
    Apr 25, 2010
    2,251
    2,530
    47
    Location:
    South Yorkshire, UK
    Vehicle:
    2016 Prius
    It was humming because it had forgotten the words :LOL:
     
    RCO, bisco and alanclarkeau like this.
Loading...