Weird nose, hybrid fan and feeling sluggish

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by mcmmotorsports, Jul 17, 2025 at 1:10 PM.

  1. mcmmotorsports

    mcmmotorsports Junior Member

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    Hello. So this sound I would hear on occasion. Now it is much more frequent. No warning lights on the dash. Previously, it would only come on after I hit the brake pedal and occasionally a few times during a drive. Now it is more frequent. Today my car felt sluggish and I could hear the hybrid battery fan which I don’t usually hear. Also, the battery level quickly drops to two bars more frequently now too.
    2015, 140k
    https://youtube.com/shorts/9Dw2Ib3b05A?si=ZxuSDcYmRRm5dQht
     
    #1 mcmmotorsports, Jul 17, 2025 at 1:10 PM
  2. rjparker

    rjparker Tu Humilde Sirviente

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    Try a little more explanation of the symptoms.

    If it's the brake booster you would hear it better under the hood, driver's side at the firewall. If this is the noise with no codes it means it is worn but still working. How long? Could be a week or a year.

    The hv battery fan usually is louder because the battery is hot, perhaps a clogged blower but just as likely a failing hv battery if it discharges fast.

    Adding a location to your profile could help someone direct you to a reduced price hybrid shop.
     
    #2 rjparker, Jul 17, 2025 at 1:21 PM
    Last edited: Jul 17, 2025 at 1:30 PM
  3. mcmmotorsports

    mcmmotorsports Junior Member

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    Sorry about that, thought my profile was complete. Greensboro, North Carolina
     
    #3 mcmmotorsports, Jul 17, 2025 at 1:29 PM
  4. bisco

    bisco cookie crumbler

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    what is the outside temp?
    what kind of driving?
    have you cleaned the battery cooling fan?
     
    #4 bisco, Jul 17, 2025 at 1:49 PM
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