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Gen 3 2015 Prius Squeaking Sound Under the Hood (w/ video)

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by HiddeninPlainSightPrius, Jan 15, 2022.

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  1. HiddeninPlainSightPrius

    HiddeninPlainSightPrius New Member

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    Anyone know what this could be, my 3rd gen 2015 prius with 38k miles is making a not so loud squeaking sound when engine turns on to charge hybrid battery.(when in idle)

    Check out this video, squeaking starts at 1:19


     
    #1 HiddeninPlainSightPrius, Jan 15, 2022
  2. bisco

    bisco cookie crumbler

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    hard to hear it, does it do it in ev?
     
    #2 bisco, Jan 16, 2022
  3. HiddeninPlainSightPrius

    HiddeninPlainSightPrius New Member

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    No never in ev, only when engine working in idle
     
    #3 HiddeninPlainSightPrius, Jan 16, 2022
  4. HiddeninPlainSightPrius

    HiddeninPlainSightPrius New Member

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    Here's an newer video, seems like it's now became a nonstop whining sound, but still squeaks the same at the end:

     
    #4 HiddeninPlainSightPrius, Jan 16, 2022
  5. bisco

    bisco cookie crumbler

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    still difficult to hear, but i do hear something. noises under the hood are usually one of the pumps, especially the 3 way coolant pump. but diagnosis is difficult without a stehescope and/or trouble codes.
    38k is pretty new to have issues, unless something is defective.
    is the hvac completely off, temp set to low, fan off?
    have you owned it since new?
     
    #5 bisco, Jan 17, 2022
  6. privilege

    privilege Active Member

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    that sounds like a bearing failing. have you tried disconnecting the fans for a moment to see if it stops ?
     
    #6 privilege, Jan 17, 2022
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