2018 Prime making high squealing noise from the dashboard area

Discussion in 'Prime Care, Maintenance and Troubleshooting' started by Sleepyshi, Oct 10, 2021.

  1. Sleepyshi

    Sleepyshi New Member

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    Hello,
    My 2018 Prius Prime plug is starting to make intermittent semi high-loud squealing/whining sounds coming from the dashboard (more towards passenger side).

    I noticed this sound
    - will occur regardless of whether the car is driving or not
    - will occur whether AC is on or off
    - more noticeable when I’m turning the wheels or braking, but still occurs when driving on in a straight direction.

    I DID notice that this sound when I was sitting in the car after turning it off. This sound happened simultaneously when the engine is doing one of it’s “powering down” arrangement of noises, which lead me to believe it is related to the system.

    I wanted to ask on here to see if anybody has come across this issue before taking it to the dealership to get it checked.
     
  2. ChapmanF

    ChapmanF Senior Member

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    Are you able to post a recording?
     
  3. bisco

    bisco cookie crumbler

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    how many miles on her?
     
  4. Sleepyshi

    Sleepyshi New Member

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    I’ll get the recording over next week. Op’s membership with Priuschat is still new.

    Around 70,000 miles right now
     
    #4 Sleepyshi, Oct 10, 2021
    Last edited by a moderator: Oct 11, 2021
  5. Sleepyshi

    Sleepyshi New Member

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    Here’s the link to the sound

     
  6. ChapmanF

    ChapmanF Senior Member

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    What a weird sound. You mentioned it "will occur whether AC is on or off"—can I assume you also tested with whether the climate control fan is on or off?
     
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  7. Salamander_King

    Salamander_King Senior Member

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    Was your audio on? Because you said the sound came out even after the car after turning it off, it is not likely to be audio. But still, I wanted to ask.
     
  8. jerrymildred

    jerrymildred Senior Member

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    That is an odd sound. I think I'd be wondering about the hvac air flow control doors. As Chap asked, is the AC off or is the whole ventilation system off?
     
  9. Sleepyshi

    Sleepyshi New Member

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    yes, the AC was off during the time when one of the intermittent noise was happening (power button was pressed off during one of these times)
     
  10. Sleepyshi

    Sleepyshi New Member

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    definitely not the audio. When this sound comes on, I would turn off the stereo and it would continue making that noise. Therefore it would happen regardless if the stereo was playing or not
     
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  11. Sleepyshi

    Sleepyshi New Member

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    i can try again with the climate control fan off to see if the noise continues. I will keep the thread posted.
     
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  12. Salamander_King

    Salamander_King Senior Member

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    Yeah, if the AC is off but HVAC is still on, then the fan might be still spinning. That would be the most likely cause. If HVAC is completely off, and still makes this sound... then we will be back to the drawing board.
     
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  13. Sleepyshi

    Sleepyshi New Member

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    After driving around for a couple days, it might be the fan, like you mentioned.
    There are a couple of times when the sound starts up, I would turn off the fan and the sound will “abruptly” squeak and stop a second after pressing the off fan button.
    I also notice that the sound does not come on if I keep the fan off for a period of time.

    I haven’t been driving as much these last few days so the sound isn’t happening as often or as loud as the video I posted. But I was able to test it when the sound is in action.
     
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