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2010 Prius POAA-526 Code

Discussion in 'Gen 3 Prius Technical Discussion' started by RWTAPP, Sep 16, 2016.

  1. RWTAPP

    RWTAPP New Member

    Joined:
    Sep 16, 2016
    1
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    Location:
    Mediapolis, IA
    Vehicle:
    2010 Prius
    Model:
    Three
    My fathers 2010 Prius has the POAA-526 Code- hybrid battery system isolation fault

    It is also showing:

    C1259-HV system Regenerative Fault

    B1475-AC inverter cooling heating malfunction

    Took to the toyota dealer, $350 later they said they thought the ac compressor was bad but couldn't say for sure. They wanted $1800-2200 to replace it with no guarantees it would fix the issue.

    Bottom line this car has 61,000 miles on it. 6 months ago the intake gaskets and manifold were replaced to the tune of $1500.

    Fed up with the car and toyota "quality",need help diagnosing.

    Where do I start?

    Thanks
     
    #1 RWTAPP, Sep 16, 2016
  2. jdcollins5

    jdcollins5 Senior Member

    Joined:
    Aug 30, 2009
    5,131
    1,338
    0
    Location:
    Wilmington, NC
    Vehicle:
    2010 Prius
    Model:
    III
    The DTC for Hybrid Battery Voltage System Isolation Fault indicates one side of the 220VDC is grounded. The AC Compressor is part of this DC voltage system so this is a reasonable possibility. They should be able to isolate the AC Compressor as the source of the ground before replacing it.

    If you have another dealer or a Hybrid repair facility you can try to get a second opinion.
     
    #2 jdcollins5, Sep 16, 2016
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