"Cooling performance of the hybrid battery system is low" message won't go off

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Jimmyewilso, Jul 25, 2021.

  1. Jimmyewilso

    Jimmyewilso New Member

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    I have the "cooling performance of the hybrid battery system is low, consult a dealer" message on my 2014 prius. I have cleaned the intake filter on the rear passenger side (it was dirty). I have inspected the hybrid battery fan and it is clean. I've have scanned the system and it is not providing any other codes that would suggest an issue.

    I was hoping that cleaning the intake filter would take care of the this, but i can't get the hybrid battery message to go away. I have unplugged the 12 volt battery, and the message is still there. Could there be a larger problem with the hybrid battery? If not, how do i get rid of this message?
     
    #1 Jimmyewilso, Jul 25, 2021
  2. Tideland Prius

    Tideland Prius Moderator of the North
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    Have you changed the inverter coolant? Or checked the coolant lines? (Separate from the engine coolant).
     
    #2 Tideland Prius, Jul 25, 2021
  3. Mendel Leisk

    Mendel Leisk Senior Member

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    How many miles?
     
    #3 Mendel Leisk, Jul 25, 2021
  4. ChapmanF

    ChapmanF Senior Member

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    The hybrid battery system is air-cooled; the inverter coolant loop doesn't run all the way back there.
     
    #4 ChapmanF, Jul 25, 2021
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  5. PriusCamper

    PriusCamper Senior Member

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    #5 PriusCamper, Jul 25, 2021
  6. Jimmyewilso

    Jimmyewilso New Member

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    #6 Jimmyewilso, Jul 25, 2021
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  7. Jimmyewilso

    Jimmyewilso New Member

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    no, i have not. Thanks! i will look into this.
     
    #7 Jimmyewilso, Jul 25, 2021
  8. bisco

    bisco cookie crumbler

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    have you cleaned the battery itself? can get pretty bad in there
     
    #8 bisco, Jul 25, 2021
  9. Jimmyewilso

    Jimmyewilso New Member

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    This is great advice, thanks. I just ordered one today. Would the "cooling performance" message go off by itself once I have cleaned the cooling system or does it always need to be reset?
     
    #9 Jimmyewilso, Jul 26, 2021
  10. PriusCamper

    PriusCamper Senior Member

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    It's probably different for gen3 than gen2... My experience with this problem in Gen2 is some corrosion in one of the plugs that powers the cooling fan. That's probably not the issue in Gen3 though.
     
    #10 PriusCamper, Jul 26, 2021
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