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HV battery dying?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by phancock24, Nov 28, 2016.

  1. phancock24

    phancock24 New Member

    Joined:
    Nov 28, 2016
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    Location:
    Oregon
    Vehicle:
    2007 Prius
    Model:
    ----USA----
    No codes yet, but I got the red triangle, check engine, VSC and brake lights.

    So, a few days ago, driving home from work, I saw all the lights go off. Looking at the energy gauge, I saw that the battery somehow spontaneously lost all but one bar. Continuing to drive, I made it home without issue and the battery recharged itself fairly quickly. I test drove the car a bit and eventually all the warning lights went away - until yesterday when the same exact thing happened.

    I can pull codes but it seems like my HV battery is in its death throes. The car is 2007, has approximately 151k miles. I figure its out of warranty. Should I go refurbished battery or new (if possible)? What kinda repair costs am I looking at?

    Edit: Official Toyota dealership in my area is offering 2588 for the battery, 715 (!) for the labor.
     
    #1 phancock24, Nov 28, 2016
    Last edited: Nov 28, 2016
  2. JC91006

    JC91006 Senior Member

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    Location:
    Los Angeles, CA
    Vehicle:
    2008 Prius
    Model:
    II
    You should get a proper code reader that can ready prius codes, it should show what's in it's history....if the codes went away.

    My guess is that you have a failed inverter pump, the lights will go off when the car cools, then come back on when it gets hot again. You can check the operation of the pump by looking into the inverter coolant reservoir and see if there's movement in the water. Movement will mean the pump works, no movement will mean the pump has failed.
     
    #2 JC91006, Nov 28, 2016
  3. phancock24

    phancock24 New Member

    Joined:
    Nov 28, 2016
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    Location:
    Oregon
    Vehicle:
    2007 Prius
    Model:
    ----USA----
    I turned on the car and checked the inverter cooler tank. I saw some gentle turbulence when the engine was on. Running a health check using TIS now.

    Alright, here are my error codes (DTC)

    Hybrid Control: P3000
    HV Battery: P0A80
    Tire pressure monitors: C2121 and C2124 (no readings came from sensors 1 and 4, it looks like I may need to replace them. However, I manually checked my tire pressures and they are within operational range (front 35psi, rear 32 psi) I think
    Air conditioner: B1412 amd V1421
    Immobiliser: B2795
    Gateway: B1271

    Battery info:
    State of charge 29.5%
    My block voltages are as follows:
    Battery Block Vol -V01 - 15.23
    Battery Block Vol -V02 - 15.28
    Battery Block Vol -V03 - 15.30
    Battery Block Vol -V04 - 15.20
    Battery Block Vol -V05 - 15.30
    Battery Block Vol -V06 - 15.28
    Battery Block Vol -V07 - 15.24
    Battery Block Vol -V08 - 15.18
    Battery Block Vol -V09 - 15.31
    Battery Block Vol -V10 - 15.22
    Battery Block Vol -V11 - 15.25
    Battery Block Vol -V12 - 15.23
    Battery Block Vol -V13 - 15.30
    Battery Block Vol -V14 - 14.00 (???)
    Calculate load: 0
    Throttle position 16.8%

    How can I further diagnose my battery, if possible?
     
    #3 phancock24, Nov 28, 2016
    Last edited: Nov 28, 2016
  4. edthefox5

    edthefox5 Senior Member

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    Location:
    Clearwater, Florida
    Vehicle:
    2007 Prius
    Model:
    Two
    Yep time for a new hybrid battery. If the rest of the car is in excellent shape I would get the new Toyota battery and have another 10 years of driving.
     
    #4 edthefox5, Nov 28, 2016
  5. fotomoto

    fotomoto Senior Member

    Joined:
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    Location:
    So. Texas
    Vehicle:
    Other Hybrid
    PA080=failed hybrid battery

    Block 14 has a failed module. Block 8 is getting weak.

    5 choices listed in order of costs:
    Replace with new toyota battery
    Replace with remanufactured battery
    Replace with another used battery
    Recondition current battery with grid charger
    Repair/replace failed module

    Here's what I did: My P0A080 fault code and battery rebuild | PriusChat
     
    #5 fotomoto, Nov 28, 2016
    edthefox5 likes this.
  6. edthefox5

    edthefox5 Senior Member

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    Location:
    Clearwater, Florida
    Vehicle:
    2007 Prius
    Model:
    Two
    Yes a full discharge/recharge with an HA system may work as the blocks aren't to bad just the one but not sure how technically handy the op is. Worth a try.
     
    #6 edthefox5, Nov 28, 2016
  7. stockdaddy

    stockdaddy Member

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    Location:
    Missouri
    Vehicle:
    2006 Prius
    Model:
    II
    your going to have to replace that bad module most likely. why take the time to tear it all down just to put back in a failing part.
     
    #7 stockdaddy, Nov 29, 2016
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