p0AA4 code negative battery contactor circuit stuck closed

Discussion in 'Gen 2 Prius Technical Discussion' started by Anthony Park, Mar 29, 2017.

  1. Anthony Park

    Anthony Park Junior Member

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    what the eff does that mean lol.

    i thought it could be the orange master plug disconnect thing... cant really go in backwards. ill try it again, but what else could it be?

    no other codes, dash lights up car doesnt do anything but park or neutral, doesnt start, obviously.


    HELLLP!! :)
     
    #1 Anthony Park, Mar 29, 2017
  2. andrewclaus

    andrewclaus Active Member

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    It refers to a relay inside the battery case. Here's the document on it.
     
    #2 andrewclaus, Mar 29, 2017
  3. Anthony Park

    Anthony Park Junior Member

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    i dont see a document. can you repost? what does the relay look like?
     
    #3 Anthony Park, Mar 29, 2017
  4. TMR-JWAP

    TMR-JWAP Senior Member

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    Anthony,
    The word "here" is highlighted as a link. Click on that word in his post and it will take you to the document. Maybe a connector isn't plugged in completely?

    Jim
     
    #4 TMR-JWAP, Mar 29, 2017
  5. Anthony Park

    Anthony Park Junior Member

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    hey fgolks thanks for all the help on both threads. Happy to say that the car is driving well. 300 miles and counting!! YAY!!!
     
    #5 Anthony Park, Apr 3, 2017
  6. JLoHybrid

    JLoHybrid Junior Member

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    AWESOME! What was the fix?
     
    #6 JLoHybrid, Apr 13, 2023
  7. netsplit

    netsplit Junior Member

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    Just fixed this code on my wife's Prius. It was a very simple fix, there was a lose nut on system relay 3 in the hybrid battery. Tightened it, put everything back together and everything is good.
     
    #7 netsplit, Aug 25, 2023
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