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2008 Weird problems, wanting opinions

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Bvhu13, Sep 29, 2023.

  1. Bvhu13

    Bvhu13 New Member

    Joined:
    Aug 22, 2023
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    Location:
    Michigan
    Vehicle:
    2008 Prius
    Model:
    SE
    Hey guys I made a post awhile ago explaining issues I was having with my car. After some replies I decide to do some more learning. What my car was doing initially was randomly losing acceleration while driving. When this happened you could watch the little energy transfer diagram and regardless of the better charge level there would be no communication between the electric engine and the rest of the car. Stopping the car, turning it off and on again would fix it. Then about a week later (thankfully the same day I got my techstream) the car would sputter while driving. Again watching the energy transfer window the car seemed to forget I was accelerating it coasting and do the exact opposite of what it was supposed too. I stopped driving it that day ran tech stream and found the P0A80, P3000-123 with a bad block 6. Took the battery apart tested the voltages found the bad suspect module and it was leaking significantly, plus another bad module. Decided to take the risk and replace those without reconditioning the battery. I did balance the modules in parallel before putting them back but I know that doesn’t do much. Was hoping to get a few months more out of the car. Went to start it and test drive it yesterday and the car wasn’t using the actual engine at all just the electric engine. Car stopped moving altogether a quarter mile down the road so restarted it and it wouldn’t start the engine at all. Car now won’t go start the engine. Ran tech stream and the original codes were gone and now I have the codes p3190 and P0A0F. Figured a random mechanical failure and working battery would be weird so I looked at my battery voltages and performed a load test. The new block I put in was severely out performing the old ones which I guess is to be expected. I’m attaching a photo of the voltages post new modules swap. So even though there isn’t any battery or HV error codes do you guys think this is the cause? Or did a new random problem pop up. Any thoughts on this whole thing would be much appreciated. I did order a 4 port lipo charger/discharger and I plan on going through the battery reconditioning process but I’m just worried that might not fix whatever is the issue.
     
  2. Bvhu13

    Bvhu13 New Member

    Joined:
    Aug 22, 2023
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    Location:
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    Vehicle:
    2008 Prius
    Model:
    SE
    Here’s the photo
     

    Attached Files:

  3. TMR-JWAP

    TMR-JWAP Senior Member

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    Vehicle:
    2007 Prius
    Model:
    Touring
    Maybe you didn't notice your 12v battery is currently only 10.6 volts.
    Your main problem is that the ICE did not start. You need to resolve that problem, not rebuild the HV battery again.
    When 12v power is disconnected or lost, the car ecus will reset to factory default values. This sometimes causes the ICE to fail to start if your throttle body/maf is very dirty.
     
    Brian1954 likes this.
  4. dolj

    dolj Senior Member

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    Apart from one module in block 6 (assuming this was one of the ones you replaced) which other module did you replace?

    Block 1 has a significantly higher voltage than all of your other blocks.

    How did you evaluate the capacity of the new module with respect to the remaining existing modules?
     
  5. Bvhu13

    Bvhu13 New Member

    Joined:
    Aug 22, 2023
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    Location:
    Michigan
    Vehicle:
    2008 Prius
    Model:
    SE
    No thank you, I’m still a newbie in this field. I didn’t notice the low voltage in the 12v. I did read on a dirty MAF/throttle body and was probably planning to look at that. However, I definitely will now. Thank you very much for the help.