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P3000-123 and... Rats!

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Downhill Fast, Jul 10, 2020.

  1. Downhill Fast

    Downhill Fast Junior Member

    Joined:
    Mar 28, 2013
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    Location:
    Ventura County
    Vehicle:
    2010 Prius
    Model:
    IV
    Well, I left the '04 Prius out for a few days and some rats decided to make it their home. They chewed the driver side speed sensor wires and one of the wires for the brake accumulator. I've repaired those, but now I'm getting a P3000 (sub code 123) with a P0A80 pending. I checked the charge/discharge voltages of the modules last weekend when I fixed the brake-related wiring issues and they all seemed to charge and discharge at the same rate. I also checked the 12v battery and that seemed to be ok as well.

    So. Can anyone think of where I should look next? I'm thinking I need to expose the traction battery and see what the ECU and its wiring looks like, but perhaps there are some wires under the hood that could have been munched that would cause the same issue? I'm grasping at straws here a bit, so any direction would be appreciated.

    Thanks!
     
    #1 Downhill Fast, Jul 10, 2020
  2. Downhill Fast

    Downhill Fast Junior Member

    Joined:
    Mar 28, 2013
    8
    9
    0
    Location:
    Ventura County
    Vehicle:
    2010 Prius
    Model:
    IV
    Did another HV battery check today and it looks like one of the modules is in fact bad. Rats are off the hook for this charge (some pun intended). Now to figure out how to replace a module.
     
    #2 Downhill Fast, Jul 11, 2020
    SFO likes this.
  3. cbeck

    cbeck New Member

    Joined:
    May 9, 2024
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    Location:
    Ottawa
    Vehicle:
    2004 Prius
    Model:
    N/A
    I had the same codes plus 603 on a vacation, the dealer wanted to change the Hybrid Battery ECU for a used $750 US but could not get one in on time. I drove home (10 hrs) and changed it myself, ($140) but it was not fixed. I changed the fan relay, confirmed the fan worked, and then followed the troubleshooting for continuity of the wiring. I found it: the brown wire from the ecu to the fan relay was bad. I spliced in a new wire and it was fixed! I reccomend that you start with the wiring troubleshooting and confirm all are good first, It takes about 1 hour to do.
     
    #3 cbeck, Jul 22, 2024
  4. Brian1954

    Brian1954 Senior Member

    Joined:
    Jan 31, 2021
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    410
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    Location:
    South Central PA, USA
    Vehicle:
    2011 Prius
    Model:
    III
    It looks like you did NOT have the same codes (P3000 & P0A80) as listed in post #1 above per your other thread that you created: https://priuschat.com/index.php?posts/3466977

    It looks like you did not have the P0A80 trouble code.
     
    #4 Brian1954, Jul 23, 2024
    Last edited: Jul 23, 2024
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