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Replaced 12v battery-still no start

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by aopisa, Jun 1, 2014.

  1. numba41

    numba41 Junior Member

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    For some reason, a weak 12v battery can cause communication issues between the ECU's and the car won't go to Ready mode. I installed 2 different Optima Yellow batteries before figuring out the Communication ID fix. Had the exact symptoms you described.
     
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  2. numba41

    numba41 Junior Member

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    Doesn't cost anything (except for the piece of wire, which any electrical wire will work) and will not cause any harm either if it's not the true issue.
     
  3. aopisa

    aopisa New Member

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    Thanks, but I don't really understand any of this.

    The only thing I have ever doe with this car is drive it and perform regular service. I have never had an issue with it.
     
  4. JC91006

    JC91006 Senior Member

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    When things get hard to understand.....refer back to post #20
     
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  5. cyberpriusII

    cyberpriusII Prodigyplace says I'm Super Kris

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    You know, there are a handful or so of people on here (myself NOT included), who nearly always make perfect sense. This person is one of them. Heed the advice given.
     
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  6. aopisa

    aopisa New Member

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    Sage advice. It's easy to start to spin out of control when you are chasing down a problem. You should see the vintage VW forums. People always have you pulling the engine before you should be just checking ground wires.

    My suspicions kept saying battery contacts too.

    Ok, put the in year old newly recharged battery in. Still nothing, no Ready light, all dash lights on. Hooked up the OBD2 and got the code (I don't remember) for low voltage. Hmmm. Went back to the car and it started! Cleared the code and all the lights went out and I took it for a very short test drive of only a few hundred feet.

    Ran the OBD2 again and got PA080 -Hybrid battery pack replacement code.

    Drove it a little more and got the hybrid battery up to about 6 blue bars. I could hear the fan running in the back. Not sure if this is normal since I still had all the compartments and other stuff out from back there and I have never driven it that way before.

    So now the question is that is this code for real or some type of remnant outlier from the 12v battery fiasco?
     
  7. JC91006

    JC91006 Senior Member

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    PA080 is the real deal. It's the HV battery failure code. You can try and put the battery on life support by re-balancing the battery pack. But it's a time delaying tactic that will come to the battery replacement in the very near future.
     
  8. aopisa

    aopisa New Member

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    Well that's a bummer. Again I find it a strange coincidence that I get this code right after I was having the 12 blot battery issue and the car was fine before all of this. Would leaving it sitting have done anything to the hybrid battery to cause this?

    I live in Vermont. The car is less than 10 years old and it has less than 150,000 miles on it. I should be good for a replacement at no charge, right? I called my Toyota dealer and they had not heard of the CARB extended warranty. ??? They had to look it up. Then they told me that PA080 meant there was dust or dirt in the hybrid battery fan. Is that there way of trying to get out of a battery replacement?
     
  9. JC91006

    JC91006 Senior Member

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    PA080 is not dust or dirt in the battery fan.

    PA080 Voltage difference between battery blocks is higher than standard. Trouble Area: HV Battery assembly; Battery ECU

    I would take it in for your free hv battery! You won the lottery
     
  10. aopisa

    aopisa New Member

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    I didn't think so. Just wondering if the dealer is blowing smoke by telling me it's dust in the fan.

    I'll make sure that it is clear that they are giving me a new battery before I take it in. I find it strange that service person claimed not to know anything about the extended warranty. Maybe they have not had to deal with this very often since it is Vermont. Or maybe they are charging people who don't know?

    Thanks.
     
  11. JC91006

    JC91006 Senior Member

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    If you are getting PA080, they will give you a new battery. Talk to the service manager, they will need you to bring the car in to confirm the code.
     
  12. usnavystgc

    usnavystgc Die Hard DIYer and Ebike enthusiast.

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    Well, here's what we have learned so far. Your battery contacts were indeed loose and that was your first problem. Your car was seemingly showing signs of a bad HV battery and now the code and your fan constantly running also confirms that. There is one more thing I'd like for you to check. When you look at the "Energy" Display, does the battery level show a rapid increase followed by a rapid decrease in SOC? I'm betting it does.

    #2, Whoever told you that at the dealership is just dead wrong and I don't know why they'd tell you that. Sometimes dealer service writers and technicians are not that well versed on the Prius but, there are many on here that are well versed and willing to help. I hate to be the bearer of bad news but, I believe that you have a bad HV battery pack.

    This is the good news. You can install a rebuilt pack for $1100. See Greentecauto.com or if you're close to Scottsburg IN, autobeyours.com
     
  13. aopisa

    aopisa New Member

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    I just need to make an appointment. Apparently there are a couple of recalls that I missed too. I should have a like new car when all is said and done! Thanks.
     
  14. aopisa

    aopisa New Member

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    I don't know what SOC is. I have not driven the car too much since yesterday. The battery display goes up at a normal rate, maybe a bit slow and goes down about the same rate. It doesn't seem to go over 6 blue bars, but it may be that I am just not driving it long enough to get there.

    I live in Vermont which is a CARB state. The car is less than 10 years old with less than 150K on it. That qualifies me for a free battery replacement. So, bad news, but good news.

    Thanks.
     
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  15. usnavystgc

    usnavystgc Die Hard DIYer and Ebike enthusiast.

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    SOC = State of Charge.

    Ok, good for you. Go get that sucker replaced then. lol. :)