prius 2010 what is this low humming noise while driving..

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by kapaoke, Aug 15, 2012.

  1. kapaoke

    kapaoke Junior Member

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    Hi
    Just got recently used prius 2010 and noticing low humming noise while driving.. every couple of minutes at slow speeds.. not sure how it is at higher speeds.
    Sounds that noise coming from somewhere front.. and remind like air conditioner in older car moving some parts when you switch from hot to cold .
    is that normal?
    sounds happen when ac is on and off.
     
    #1 kapaoke, Aug 15, 2012
  2. cwerdna

    cwerdna Senior Member

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    Can you put up a videos/recording of the noise? YouTube's a good place for videos.

    Is it an interior or exterior sound? Is it the same sound if you pump the brake pedal a few times?
     
    #2 cwerdna, Aug 15, 2012
  3. kapaoke

    kapaoke Junior Member

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    interior sound.. will try to make video.. it is not loud at all and last couple of seconds and would only be noticeable if very quiet
     
    #3 kapaoke, Aug 15, 2012
  4. kapaoke

    kapaoke Junior Member

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    sound more like cd player changing discs
     
    #4 kapaoke, Aug 15, 2012
  5. jdcollins5

    jdcollins5 Senior Member

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    It could be the Nav/GPS DVD spinning.
     
    #5 jdcollins5, Aug 16, 2012
  6. PriusInParadise

    PriusInParadise Member

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    It might be the hydraulic brake pump motor.
    With the vehicle in Ready, pump the brake pedal a few times. This should trigger the pump motor. See if you hear the same sound.
    By the way, this pump also runs for several seconds when first opening the driver's door when the car is parked.
     
    #6 PriusInParadise, Aug 17, 2012
  7. kapaoke

    kapaoke Junior Member

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    it looks like its hydraulic brake pump motor. I hear that sound when pump breaks twice.
    I guess that is normal sound?
     
    #7 kapaoke, Aug 18, 2012
  8. PriusInParadise

    PriusInParadise Member

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    Yes, its normal. The Prius makes quite a few sounds that conventional gas cars don't. I guess it just takes getting used to them.
     
    #8 PriusInParadise, Aug 19, 2012
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