07 Prius/Strange Dash noises/video

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Scott56, Dec 19, 2017.

  1. Scott56

    Scott56 Junior Member

    Joined:
    Jun 16, 2017
    40
    24
    1
    Location:
    Alabama
    Vehicle:
    2007 Prius
    Model:
    Two


    I'm trying to figure out what this sound is. The dealership checked the brake actuators shortly after this started and it didn't pull any codes or see a problem.
     
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    95,336
    43,218
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    sounds like the actuator. might not be throwing codes yet.
     
  3. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
    15,110
    7,755
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2010 Prius
    Model:
    V
    It's a soon to fail 3 way coolant valve. It hasn't failed so there's no codes to pull. When if fails, you'll get a check engine light.

    You can check if your coolant at the radiator is full. Then turn on your heater and run it for a few minutes. That usually gets rid of the noise for a day......then rinse and repeat until you replace the valve
     
  4. Texas Hybrid Batteries

    Texas Hybrid Batteries Senior Member

    Joined:
    Sep 7, 2014
    256
    502
    3
    Location:
    Dallas -Fort Worth
    Vehicle:
    2006 Prius
    Model:
    N/A
    +1. Mine did that for a year before I replaced the valve. Never did throw a code.
     
  5. Scott56

    Scott56 Junior Member

    Joined:
    Jun 16, 2017
    40
    24
    1
    Location:
    Alabama
    Vehicle:
    2007 Prius
    Model:
    Two
    Thanks so much for the diagnosis! I just had both coolants changed last year and wished I had the mechanic change out this valve at the same time. I read that it could be a 500 dollar fix at the dealership but I'll just keep hope it doesn't fail anytime soon.
     
  6. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
    15,110
    7,755
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2010 Prius
    Model:
    V
    I believe it's $77 on Amazon for the part. You can buy a set of plastic hose clamps $10 on Amazon. Clamp the hoses so coolant doesn't leak out and change it out. You can watch youtube videos on how to do this. I would say, it would take a regular DIY person about 2 hours to figure everything out. I can do it in about 1 hour (but I've had a few practice runs and I have smallish hands)
     
    SFO likes this.
  7. Scott56

    Scott56 Junior Member

    Joined:
    Jun 16, 2017
    40
    24
    1
    Location:
    Alabama
    Vehicle:
    2007 Prius
    Model:
    Two
    I read that the valve has to be clear of any air bubbles that might seep in the valve, like vacuum tight.
     
  8. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
    15,110
    7,755
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2010 Prius
    Model:
    V
    There should not be any air in your coolant loop. The valve is just a bad valve, they stick. Only way to fix them is to replace them.
     
Loading...