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P0A94 DTC

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Thumb, May 12, 2016.

  1. Thumb

    Thumb Junior Member

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    Hello
    This code appear after I connect two Prius batteries in parallel.
    Any idea??
     
    #1 Thumb, May 12, 2016
  2. S Keith

    S Keith Senior Member

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    What does the repair manual say?

    What were the sub codes?
     
    #2 S Keith, May 12, 2016
  3. Thumb

    Thumb Junior Member

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    Repair manual says that is inverter overheat.....but this code appear 200meters after I connect the two batteries
     
    #3 Thumb, May 12, 2016
  4. S Keith

    S Keith Senior Member

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    No it doesn't. It has 25 different subcodes associated with it. What are the subcodes?
     
    #4 S Keith, May 12, 2016
  5. Thumb

    Thumb Junior Member

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    The only code that I read in HV System is P0A94 ,in HV battery has no DTC.
    Is possible the inverter can not manage twice power??
     
    #5 Thumb, May 12, 2016
  6. S Keith

    S Keith Senior Member

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    What are the subcodes? There are 25 different causes for this code.

    The problem here is that you embarked on a major modification without the knowledge or tools to do it right.

    Remove the battery. Does it go away?
     
    #6 S Keith, May 12, 2016
  7. Thumb

    Thumb Junior Member

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    You have right I have the tools but I don't have the nessecery knowledge.
    Tomorrow I try to remove the second battery and test again...

    Is possible this modification damage the inverter???
    Is any way to connect the second battery without problem?

    Thanks
     
    #7 Thumb, May 12, 2016
  8. S Keith

    S Keith Senior Member

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    If you can't tell me the subcodes, you do NOT have the proper tools.

    I wouldn't expect so, but you won't know until you remove it.

    Paralleling NiMH is not a good idea most of the time. I have no idea if it can be done. The benefits are so limited, I can't imagine it's worth it.
     
    #8 S Keith, May 12, 2016
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  9. Thumb

    Thumb Junior Member

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    I have the teachstream and i don't have subcodes.
    Is possible the parallel lithium?
     
    #9 Thumb, May 12, 2016
  10. bisco

    bisco cookie crumbler

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    i really don't see what the issue could be, are you sure you connected them in parallel?
     
    #10 bisco, May 12, 2016
  11. dolj

    dolj Senior Member

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    I can't imagine that it would be a simple thing to connect two batteries in parallel, otherwise everybody would be doing it. Also, presume that there would be a benefit.

    In relation to the second battery, questions that immediately come to my mind are:
    • how are the battery temps being monitored?
    • how are the module voltages being monitored?
    • how is the battery current (both in and out) being monitored?
    • how is the HV battery control module interfacing with the additional battery?
     
    #11 dolj, May 13, 2016
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