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Odd Dr Prius readings…??

Discussion in 'Gen 2 Prius Main Forum' started by Ernie stires, Jul 16, 2023.

  1. Ernie stires

    Ernie stires Member

    Joined:
    Jun 28, 2022
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    Location:
    Colorado
    Vehicle:
    2005 Prius
    Model:
    Base
    Installed a reconditioned hv battery about a month ago. Things seemed good. Now I’m getting this, lasts about 1/2 second. No codes.
    Ideas?
     

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    #1 Ernie stires, Jul 16, 2023
  2. PriusCamper

    PriusCamper Senior Member

    Joined:
    Mar 3, 2012
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    Location:
    Pacific Northwest, USA
    Vehicle:
    2007 Prius
    Model:
    Two
    There's corrosion on the voltage sensor pins inside the hybrid battery ECU and it's thick enough to start shorting itself out with micro arcs of electricity. You might be able to clean this, or if it's already fried a used one online is about $100. Also replacing voltage sensor harness with brand new would be wise to do. It's all because Toyota's Nickel based battery technology is prehistoric and it leaks toxic electrolyte at the seals where the terminal connect. Once you get this all cleaned up it won't be an issue, but hopefully the person who sold you the reconditioned pack will deal with it. Eventually you'll get a P3000 error code.
     
    #2 PriusCamper, Jul 16, 2023
    Ernie stires likes this.
  3. Ernie stires

    Ernie stires Member

    Joined:
    Jun 28, 2022
    107
    30
    0
    Location:
    Colorado
    Vehicle:
    2005 Prius
    Model:
    Base
    So it turns out my OBD reader was failing, these readings are false. I did a full look-see using Techstream and all is well with the battery. I have a replacement OBD reader on the way.
     
    #3 Ernie stires, Jul 17, 2023
    donbright likes this.
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