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

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    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.
     
    #1 Scott56, Dec 19, 2017
  2. bisco

    bisco cookie crumbler

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    sounds like the actuator. might not be throwing codes yet.
     
    #2 bisco, Dec 19, 2017
  3. JC91006

    JC91006 Senior Member

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    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
     
    #3 JC91006, Dec 19, 2017
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  4. Texas Hybrid Batteries

    Texas Hybrid Batteries Senior Member

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    +1. Mine did that for a year before I replaced the valve. Never did throw a code.
     
    #4 Texas Hybrid Batteries, Dec 19, 2017
  5. Scott56

    Scott56 Junior Member

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    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.
     
    #5 Scott56, Dec 20, 2017
  6. JC91006

    JC91006 Senior Member

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    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)
     
    #6 JC91006, Dec 20, 2017
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  7. Scott56

    Scott56 Junior Member

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    I read that the valve has to be clear of any air bubbles that might seep in the valve, like vacuum tight.
     
    #7 Scott56, Dec 20, 2017
  8. JC91006

    JC91006 Senior Member

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    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.
     
    #8 JC91006, Dec 20, 2017
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