Squeaking noise from engine on stage 1a

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Abarnabe, Jul 13, 2025 at 7:11 AM.

  1. Abarnabe

    Abarnabe Member

    Joined:
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    Vehicle:
    2010 Prius
    Model:
    III
    I've recently noticed a squeaking noise coming from the driver / transmission side of the engine bay on stage 1a, after transitioning to 1b I can't hear it anymore.

    I can't reproduce the sound in inspection mode.

    I thought it could be the engine coolant pump, but I turned it on with engine off with techstream, and there is no squeaking, so I would rule it out.

    The car has 310k KM.
    Transmission oil changed every 90k Km
    Virtually no engine oil consumption.
    No DTC codes.

    What could it be?
     
    #1 Abarnabe, Jul 13, 2025 at 7:11 AM
    Last edited: Jul 13, 2025 at 2:47 PM
  2. Brian1954

    Brian1954 Senior Member

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    Model:
    III
    Does the squeaking sound occur when the car is stationary or when the car is being driven on the road?
     
    #2 Brian1954, Jul 13, 2025 at 9:18 AM
    Last edited: Jul 13, 2025 at 3:22 PM
  3. Abarnabe

    Abarnabe Member

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    Vehicle:
    2010 Prius
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    III
    it occurs when the car is stationary
     
    #3 Abarnabe, Jul 13, 2025 at 11:19 AM
  4. Abarnabe

    Abarnabe Member

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    Vehicle:
    2010 Prius
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    III
    #4 Abarnabe, Jul 13, 2025 at 2:47 PM
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