P0A80 "Check Hybrid System" but no RTOD after fan cleaning

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by model464, Aug 25, 2020.

  1. model464

    model464 New Member

    Joined:
    Jul 18, 2020
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    Location:
    Colorado
    Vehicle:
    2010 Prius
    Model:
    II
    Last night I finally cleaned the filthy HV battery fan on my 2010. This morning I got a "Check Hybrid System" warning about a minute after startup. I pulled over and read the fault codes with the Torque, Dr Prius, and Carista apps on a Carista adapter. All returned a P0A80, but I'm confused because I didn't have a RTOD.

    The following lights did turn on along with the warning, as named in the manual:

    Master warning
    Slip indicator
    Malfunction indicator lamp
    ABS warning
    Brake system warning

    (I'll try to attach a photo with these circled in red)

    After I cleared the code with Dr Prius, the idiot lights turned off; Torque didn't detect the code anymore but Dr Prius and Carista still did. I tried clearing the code with Carista and it said "error successfully reset but came back on".

    Did a Dr Prius life test for good measure and it returned ~12% life remaining. I already figured I'd soon need a new battery based on previous Dr Prius tests and observed battery performance.

    Hypothesis: It isn't a real live HV battery failure and I can keep driving (100mi/day as a delivery contractor), but I should plan to proactively replace my battery soon.

    If so, I feel like an idiot for calling in to work today for nothing, but I can't be sure because I'm a noob...
     
    bisco likes this.
  2. model464

    model464 New Member

    Joined:
    Jul 18, 2020
    8
    8
    0
    Location:
    Colorado
    Vehicle:
    2010 Prius
    Model:
    II
    Here are the idiot lights I mentioned in the initial post:
     

    Attached Files:

  3. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    94,734
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    how many miles on her?

    can you run a cell check with dr. prius?
     
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