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Cant reset codes after hybrid battery cell replacement

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by ericb1, Jul 20, 2019.

  1. ericb1

    ericb1 Junior Member

    Joined:
    Jul 24, 2016
    7
    0
    0
    Location:
    az
    Vehicle:
    2010 Prius
    Model:
    V
    First time posting here, sorry for hurried post. I need this car running tonight if possible. My other Yota is a Landcruiser and I spend a lot of time on IH8MUD

    So I got the triangle of death in my 2010 Prius.
    "Check Hybrid System" appears on dash
    Auto-zone scan stated bad hybrid battery
    I had 4 cells test low with manual probing of each

    I ordered 4 replacement cells, all tested 7.8V+
    Installed them and mixed up the order, alternating, terminals in correct spots
    reinstalled and rewired, no loose ends found

    "Check Hybrid System" appears on dash
    My garbage OBDII reader fails
    disconnected 12V battery several times for several minutes
    Disconnected large white wire in fuse box for several minutes

    Tool Shows P0A80 & POB4C on an INNOVA 3130 Scan Tool
    I have reset each several times and the code repeats
    What am I missing?

    Thoughts:
    1. Do cells need to be "balanced" in charge before install? Most of the cells were around 7.76 volts and the new cells were 7.8V. I waited a week and worry the original cells dropped to low. Can the batter be charged as a whole, or do I need to recharge the cells, ie, probably sell or buy new car/battery
    2. Is there a simple key or start sequence I need to do in order to get the codes to clear that is preventing the clearing, I am in normal RUN mode, vehicle WILL NOT go int drive or reverse
    My Prius NEVER breaks so I am new to it, sorry for cross-post from "General", no responses there
    THANK YOU
     

    Attached Files:

  2. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
    16,525
    8,428
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2008 Prius
    Model:
    II
    1. Does the car get into Ready mode? If you don't see the 0 in your speedometer, then it's not in Ready mode.
    2. Did you lock the orange interlock when you were done putting everything back?

    P0A80 will not prevent the car from starting and getting into Ready mode. I would also double check all the nuts on the terminals, make sure they are tight.
     
    Raytheeagle likes this.