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Control valve or inverter pump noise?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by GenxPri, Nov 24, 2024 at 1:56 PM.

  1. GenxPri

    GenxPri Junior Member

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    Vehicle:
    2008 Prius
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    Three
    Please take a look and listen to my video of the sounds I hear in my 2008 Prius. What can the knocking sound be? The pump whine noise sounds okay right? And the inverter coolant movement seems normal? The coolant color doesn’t look as hot pink as some others though, and it seems low? Should I top it off with new coolant or change it?

    Car has 167k miles on it.

     
    #1 GenxPri, Nov 24, 2024 at 1:56 PM
  2. Tombukt2

    Tombukt2 Senior Member

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    Just top off the inverter for now and that sounds like your coolant control valve or something clicking away so right next to your inverter pump on the inside of the radiator you'll see the coolant control valve put your hand on us that what's making the clicking noise usually the inverter pump doesn't make that kind of noise at all everything else sounds pretty normal
     
    #2 Tombukt2, Nov 24, 2024 at 8:10 PM
  3. dolj

    dolj Senior Member

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    Is the sound louder towards the lefthand side (US driver's side) down behind the headlight enclosure?
     
    #3 dolj, Nov 24, 2024 at 10:38 PM
  4. GenxPri

    GenxPri Junior Member

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    Vehicle:
    2008 Prius
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    Three
    I think it sounds loudest near from of the inverter tank, middle of car or slight left of inverter cover, as I’m facing the engine in a US car.
     
    #4 GenxPri, Nov 24, 2024 at 10:52 PM
  5. GenxPri

    GenxPri Junior Member

    Joined:
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    Location:
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    Vehicle:
    2008 Prius
    Model:
    Three
    Got the coolant from dealer today. Can’t wait to top it off and see/hear when my girl bring the car home.
    Hope I don’t have to change the valve or pump yet. Did get the P1121 and cleared it. Hope topping off will keep the code away for now to pass smog first.
     
    #5 GenxPri, Nov 24, 2024 at 10:54 PM
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