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2006 Prius run-on after turning off?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by jgny, Oct 19, 2013.

  1. jgny

    jgny Junior Member

    Joined:
    Oct 15, 2013
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    Location:
    NY
    Vehicle:
    2006 Prius
    Model:
    Two
    We are only one week in to owning our 2006 Prius,,, love it! Question is why does it sound like a motor whirring sound after turning it off? It only lasts 20 to 30 seconds,,, just wondering if this is a normal sound? Thanks. :)
     
    #1 jgny, Oct 19, 2013
  2. Patrick Wong

    Patrick Wong DIY Enthusiast

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    Location:
    Green Valley, AZ
    Vehicle:
    2015 Prius
    Model:
    Two
    You are hearing the engine coolant heat recovery pump and this is normal. This pump will frequently run when the car is first started and when it turns off. The purpose of the pump is to move hot coolant to and from the coolant heat recovery canister which is a thermos container that stores ~3-4 quarts of engine coolant. This is supposed to shorten engine warmup time, thus reducing emissions produced during warmup.
     
    #2 Patrick Wong, Oct 19, 2013
    cwerdna, dorunron and JimboPalmer like this.
  3. jgny

    jgny Junior Member

    Joined:
    Oct 15, 2013
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    Location:
    NY
    Vehicle:
    2006 Prius
    Model:
    Two
    Thanks, I had a feeling the car knows what it is doing!
     
    #3 jgny, Oct 19, 2013
  4. JimboPalmer

    JimboPalmer Tsar of all the Rushers

    Joined:
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    Location:
    Greenwood MS USA
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    [​IMG]
     
    #4 JimboPalmer, Oct 19, 2013
  5. edthefox5

    edthefox5 Senior Member

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    Location:
    Clearwater, Florida
    Vehicle:
    2007 Prius
    Model:
    Two
    Lots of new noises. Next time you get in the car before you start it push the brake pedal a few times. That will activate the brake vacuum pump. Sounds like a rattlesnake behind the dashboard. You will hear that noise alot too.
     
    #5 edthefox5, Oct 20, 2013
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