Dead aux, HV, or both?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by k1ngn0thing, Mar 8, 2018.

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  1. k1ngn0thing

    k1ngn0thing Member

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    I bought an 07 in May 2017 from a dealer with ~218,000 miles. They installed a new HV battery prior to purchase. About a month and a half ago my starter battery died. Got it jumped and everything was fine until this morning, when a bunch of lights came on. Did some driving and some went off, leaving the red triangle exclamation and check engine lights on. OBD shows code C1241 as "current' and p0a80 "pending." I'm assuming the latter will be resolved when I put a new 12v battery in. Probably drove 30 mins total today, but it was not all one trip and definitely didn't charge the battery enough as it now sits dead after a few minutes of troubleshooting, which included trying to enter the on-board diagnostic mode to check the 12v battery voltage. However, whenever I tried to flick the headlights on and off 3x as is required, the system would reboot as soon as the lights came on. There was some heavy rain yesterday and I found flooding in the trunk, but doesn't appear to have made contact with the HV. I've put less than 10k miles on it since the new HV was installed so it doesn't seem likely that this is the issue and can't do much but wait until my new aux comes in, but wanted to get some feedback from those who have been in a similar situation. Here's a video which might help. I don't remember ever seeing this kind of behavior on the display (tire pressure light is on because new sensor isn't calibrated). You can also hear a sloshing sound shortly after the engine starts up. Also note how the engine briefly starts and dies before starting back up:




    c1241.jpg p0a80.jpg dash.jpg water.jpg waater.jpg
     
    #1 k1ngn0thing, Mar 8, 2018
    Last edited: Mar 8, 2018
  2. Prodigyplace

    Prodigyplace 2025 Camry XLE FWD

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    Did you buy the car from a Toyota dealer? The HV battery is the starter battery, The fact you needed to jump the car indicates a failing 12 volt battery.
    If you did not buy from a Toyota dealer they likely did not get a new battery from a Toyota dealer but installed a battery repaired using old modules.. Toyota is the only source of new battery packs.
    P0A80 usually indicates a HV battery issue.
    A user here has started selling a kit of new cells to DIY repair a battery pack, but I believe they are backordered. The info is in my signature.
     
    #2 Prodigyplace, Mar 8, 2018
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  3. k1ngn0thing

    k1ngn0thing Member

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    Wasn't a Toyota dealer, so I guess they could have said "new" and actually put in a rebuilt, though they did use the word New on the documentation. Won't bother getting into that until I try the new battery. My MPG has also been consistently 45+, and I think that was the case today as well.
     
    #3 k1ngn0thing, Mar 8, 2018
  4. Stevewoods

    Stevewoods Senior Member

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    Don't worry until you get an new 12v in there and are still having problems.

    If the 12v is weak it will tell you all sorts of falsehoods, from there are kittens in the engine filter compartment to aliens in the backseat.

    You still having problems after the new 12v, post back. Until then, a bit pointless.

    Disclaimer
    Hmmm, I guess according to the new unofficial proposed guidelines here, I need to state that I am not, nor have I ever been an expert on Prius cars, or any cars, or anything for that matter. Nor, am I now, or I have ever been a member of the Bull Moose Party.
     
    #4 Stevewoods, Mar 8, 2018
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  5. edthefox5

    edthefox5 Senior Member

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    Prodigy for the win.
     
    #5 edthefox5, Mar 8, 2018
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  6. Prodigyplace

    Prodigyplace 2025 Camry XLE FWD

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    Thanks.
    I am still a newbie but I try and learn from the experienced and assist where I can.
     
    #6 Prodigyplace, Mar 8, 2018
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  7. Stevewoods

    Stevewoods Senior Member

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    Both Prodigy and ETF5 are disqualified as they did not post a disclaimer.

    But, in all seriousness, there certainly could be an issue with the "NEW" traction battery, but again, get the 12v squared away before going too ballistic about anything else.
     
    #7 Stevewoods, Mar 8, 2018
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  8. SFO

    SFO Senior Member

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    You might want to drain any standing water in the spare tire and 12v battery well by removing the rubber plug(s).

    There are many threads that address roof line and hatch related leaks, this link should get you started.

    https://priuschat.com/threads/water-leak-into-spare-tire-area-etc.60295
     
    #8 SFO, Mar 9, 2018
  9. k1ngn0thing

    k1ngn0thing Member

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    replaced 12v, took a short trip, drove fine, then on the way back the lights came on and the HV battery dropped to 1 bar. I'm pretty sure I still heard water moving around, so maybe water got to my HV? is there anywhere for water to pool in that area? how can I check without killing myself?

    here's a video shortly after the lights came on:


    this was taken after parking. what is that whirring sound after turning the car off?
     
    #9 k1ngn0thing, Mar 10, 2018
  10. k1ngn0thing

    k1ngn0thing Member

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    my mileage is all over the place, and it feels like my brakes sometimes briefly cut out.
     
    #10 k1ngn0thing, Mar 10, 2018
  11. k1ngn0thing

    k1ngn0thing Member

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    thinking I might try to rebalance. is there a better way than spending $400 on the Prius Chat shop's charger?
     
    #11 k1ngn0thing, Mar 10, 2018
  12. SFO

    SFO Senior Member

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    Is the HV battery new or otherwise?
     
    #12 SFO, Mar 10, 2018
  13. k1ngn0thing

    k1ngn0thing Member

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    dealer put a "new" one in when I bought it 10 months ago, but now I'm assuming they simply replaced the faulty cells considering I got it for 4 grand.
     
    #13 k1ngn0thing, Mar 10, 2018
  14. Prodigyplace

    Prodigyplace 2025 Camry XLE FWD

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    Do NOT buy from the PriusChat Shop. Unfortunately people have not had good experiences there lately.
    They are picturing the older version of the Prolong charger by Hybrid Automotive. The owner, @jeff652 is well respected here. They now have an intelligent discharger that, combined with the charger helps recondition the battery. You can order directly from Hybrid Automotive.

    The Deluxe reconditioning package is $668. Prolong® Deluxe Reconditioning Package - Hybrid Automotive

    The charger only, with a discharge ready harness, is $399. Prolong® Battery Charger - Hybrid Automotive
     
    #14 Prodigyplace, Mar 10, 2018
    Last edited: Mar 10, 2018
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  15. k1ngn0thing

    k1ngn0thing Member

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    Given my battery is already in poor health, will this be sufficient, or do you think I'll have to replace cells?
     
    #15 k1ngn0thing, Mar 10, 2018
    Last edited: Mar 10, 2018
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  16. Prodigyplace

    Prodigyplace 2025 Camry XLE FWD

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    @jeff652 sometimes responds here but people have been very pleased with advice given by calling Hybrid Automotive. @Raytheeagle or others here could advise better than I.
     
    #16 Prodigyplace, Mar 10, 2018
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  17. Raytheeagle

    Raytheeagle Senior Member

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    I helped a member here at the end of last year swap a couple of modules into his pack (he had 2 fail) and his battery is stronger than ever:).

    Some questions:

    • Has your battery thrown any codes?
    • How many miles?
    • Original pack?
    • Are you the DIY type?
    • Where in the USA are you located?
    Havin shares this experience with another member and owning the equipment myself, if (and this is a big if since I have started reconditioning before our 2010’s pack was further down the path) I had a failed module, I’d swap it out and recondition the pack ;).

    I think the equipment is a great investment, particularly if you live near others that you can share with(y).
     
    #17 Raytheeagle, Mar 10, 2018
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  18. k1ngn0thing

    k1ngn0thing Member

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    listed the codes above. 226k miles but "new" pack was put in 8k miles ago, but could have just been a few new cells. I'm the DIY type when risk is low enough or I can't afford to not DIY. I'm located on the complete opposite end of the country in MA. I think I'm going to buy the deluxe reconditioning package just so I don't have to deal with this crap on a regular basis down the line. Depending on how bad things look with the OBD I might just not replace any cells for now. Even if I get 6 months before a cell needs replacing, it will be less of a hit to the wallet than buying everything at once.
     
    #18 k1ngn0thing, Mar 10, 2018
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  19. Prodigyplace

    Prodigyplace 2025 Camry XLE FWD

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    Hybrid automotive also sells used modules if you need them. They test them and guarantee for a year IIRC.
     
    #19 Prodigyplace, Mar 10, 2018
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  20. Raytheeagle

    Raytheeagle Senior Member

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    There are a couple of members on here that have the Prolong equipment that might be willing to share their experience: @VFerdman was one of them.

    The PA080 is a sign of the hv battery pack failing, but doesn’t give enough detail:(.

    If the DIY type, I’d go on amazon and look for Mini VCI J2534 cord and find an old laptop. This will give you the ability to have Techstream assist in code reading:).

    I used it this morning to support another member on a project. It has many uses and can help you determine the true root cause fnyour issue. Here’s a screen shot from my laptop which gives you the individual block voltages as well as internal resistances:

    B8347EE0-3BAC-48AE-83FF-532343A2AC6B.jpeg B495522F-EA4E-4233-8FDD-959A373F8356.jpeg

    The reconditioning equipment will be useful if you decide to go that route:).

    Keep us posted (y).
     
    #20 Raytheeagle, Mar 10, 2018
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