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2012 Prius V wagon

Discussion in 'Prius v Technical Discussion' started by Kathy Luper, Apr 28, 2023.

  1. Kathy Luper

    Kathy Luper New Member

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    Location:
    Moffett, Oklahoma
    Vehicle:
    2012 Prius v wagon
    Model:
    Base
    My 2012 Prius v wagon has lost communication with the ECM when I was cleaning fuel injector and fuel shot out. I forgot to disconnect the battery. I hurried and disconnected the battery. I got everything put back with the injector and now the car won’t start and is showing code UO100.

    what do I do now?
     
    #1 Kathy Luper, Apr 28, 2023
  2. rjparker

    rjparker Tu Humilde Sirviente

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    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    The communication to one or more modules is bad. It almost always takes two attempts after the disconnect. Obviously check all connectors you touched around the engine. Clear codes.

    I would try disconnecting the battery negative for a minute or two and try again. If that does not work I would open the hood and aim a good fan at the area. If not a loose connection, the fuel has moved some dirt around and caused a short.

    In the future don't clean the injectors. They don't need it with additives included in all fuel. Even the cheap gas.
     
    #2 rjparker, Apr 28, 2023
    Tim Jones likes this.
  3. Tim Jones

    Tim Jones Senior Member

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    Maybe she disconnected the Traction Battery
     
    #3 Tim Jones, Jun 1, 2023
  4. SSAutomotive

    SSAutomotive Junior Member

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    Location:
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    Vehicle:
    2011 Prius
    Model:
    Two
    Prep out for a new ECU, assuming you shorted something. Check power to ECU, and any other fuses; ign., fuel inj., etc. If you have power to the ECU main then that's your dead giveaway. Good luck and seconding never cleaning injectors.
     
    #4 SSAutomotive, Jun 21, 2023
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