2007 Prius with C1259 and C1310 - any ideas?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by romanlutsk, Apr 7, 2016.

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  1. romanlutsk

    romanlutsk Junior Member

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    I'm helping to fix someone else's 2007 Prius and after replacing 2 failed battery cells, cleaning the electrolyte leak (P0AA6 with 526 and 612) and putting in a new 12v lawn mower battery, the final codes (C1259 and C1310) still remain.

    The Techstream scanner doesn't report any subcodes (sometimes there is a blue snowflake symbol besides C1310, but when I double-click on it, it says something to the effect of "this DTC does not exist").

    I used the Exetech megohmmeter with 500V setting on the battery (but disconnected the battery ECU and other cables prior to the test, so I don't think I damaged the ECU).

    Here's the history of codes, as I worked on that prius, in reverse chronological order:

    ******************
    C1259 - HV system regenerative malfunction
    C1310 - HV system malfunction

    ---------------
    P0AA6
    526
    612
    - cleaned the leaked electrolyte on the bottom of the HV battery case

    C1259
    C1310
    B1421

    ---------------
    P0AA6
    C2310
    C2318
    - replaced 12V battery

    ----------------
    P0A0D
    - push the interlock (service plug on the hybrid battery) down

    C1259
    C1310
    B1421

    - found two low voltage cells and replaced them
    **************

    The engine starts, but the red triangle, VSC, check engine and other lights come on.

    I've charged the new battery completely, tried clearing the codes (but they come back right away), any ideas what else I could try?

    Thanks!
     
    #1 romanlutsk, Apr 7, 2016
    Last edited: Apr 7, 2016
  2. romanlutsk

    romanlutsk Junior Member

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    Mystery solved. It turns out that a nut on one of the cell terminals in the HV battery (the one with the sense wire) was missing, so the HV battery ECU couldn't get a good reading of the voltage.

    I put a nut back on, cleared the codes, restarted the car a couple of times and the errors are gone for now. Hopefully it stays that way.
     
    #2 romanlutsk, Apr 8, 2016
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  3. bisco

    bisco cookie crumbler

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    well done!(y)
     
    #3 bisco, Apr 8, 2016
  4. Mercedes Blake

    Mercedes Blake New Member

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    How much did all of this cost you? The same lights are on my car with codes P3014, P3000, C1241, C1259, C1310. I was told I could replace 6 parts that are inside the battery which cost about $30 each part but I’m still unsure of what exactly is going on. Do I need to buy a whole new battery?
     
    #4 Mercedes Blake, Jul 9, 2018
  5. bisco

    bisco cookie crumbler

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    you don't have a failed battery code. perhaps the bus bars and etc. are corroded.
     
    #5 bisco, Jul 10, 2018
  6. dolj

    dolj Senior Member

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    Actually there are two codes that indicate the battery is not really happy:

    P3014 = Battery Block 4 Becomes Weak
    P3000 = HV Battery Malfunction
    Not sure what "6 parts" they had in mind, but you likely need only one or two modules replaced. In addition, like bisco said, you will more than likely need the bus-bars cleaned as well.
    If you want another 10 years reliable use of your car, and it is in otherwise excellent condition, you should consider just replacing the whole battery with a Factory OEM new battery, and not a secondhand battery of any description, which includes descriptions such as "rebuilt", "reconditioned", etc. If it would not make sense to put in and OEM new battery, then you should rework the battery yourself. If you are not the DIY type, @JC91006 or @TMR-JWAP may be able to recommend a place where you could have the work done. TMR-TWAP might even have a solution to offer you.
     
    #6 dolj, Jul 10, 2018
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  7. JC91006

    JC91006 Senior Member

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    If you have a good condition, low mileage car, I would recommend you buy a new battery and forget about it. This is the most reliable option. You can also try and request a good will warranty from Toyota to get your battery replaced

    If you have some issues, high mileage, and need to buy extra time before getting another car, then you should repair the battery and not buy new. This option is not very reliable but it's fairly affordable. And there are even members in your neck of the woods (northern cal) that can help with this option. @SFO @Raytheeagle
     
    #7 JC91006, Jul 10, 2018
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  8. Raytheeagle

    Raytheeagle Senior Member

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    @Mercedes Blake , welcome to Prius Chat (y).

    Some questions:
    • How many miles on your Prius?
    • Original owner, or how long have you had this Prius?
    • What condition is the Prius in?
    • Any recent maintenance performed?
    If you can provide more details, I can probably help out:).

    Good luck and keep us posted (y).
     
    #8 Raytheeagle, Jul 10, 2018
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  9. Gypsy62

    Gypsy62 Junior Member

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    Nice escape!
    If, by chance, you took a pic of the location of the terminal with the missing nut that would be useful.
    Cheers
     
    #9 Gypsy62, Jul 25, 2018
  10. JC91006

    JC91006 Senior Member

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    I think it's any of the 28 modules, 1 missing a nut
     
    #10 JC91006, Jul 25, 2018
  11. Gypsy62

    Gypsy62 Junior Member

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    OP wrote: "It turns out that a nut on one of the cell terminals in the HV battery (the one with the sense wire) was missing"
    As a newbster, his reference to "the ONE with the 'SENSE' wire" means nothing to me, so I was hoping a pic could illustrate which cell/block has this 'sense' wire.
     
    #11 Gypsy62, Jul 25, 2018
  12. JC91006

    JC91006 Senior Member

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    You can't have any missing nuts, regardless of its location.
     
    #12 JC91006, Jul 25, 2018
  13. Gypsy62

    Gypsy62 Junior Member

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    So when the OP said
    "It turns out that a NUT on one of the cell terminals in the HV battery (the one with the sense wire) was missing"
    maybe they were referring to a 'wire' nut and not a 'mechanical' nut?
    Just trying to get clarification...
    Thanks
     
    #13 Gypsy62, Jul 25, 2018
  14. JC91006

    JC91006 Senior Member

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    Here's a bowl of terminal nuts 1532568023100.jpeg
     
    #14 JC91006, Jul 25, 2018
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  15. Alam

    Alam New Member

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    #15 Alam, Nov 17, 2018
  16. Alam

    Alam New Member

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    I have a code p0a80 I checked all the cell all of them 8.11v and up to 8.34v . This is 2015 Toyota Prius V can you please help me out
     
    #16 Alam, Nov 17, 2018
  17. bisco

    bisco cookie crumbler

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    you need to test them under a load. how many miles on her?
     
    #17 bisco, Nov 18, 2018
  18. Raytheeagle

    Raytheeagle Senior Member

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    There are usually other codes associated that will also point you in the right direction ;).

    What scanner are you using?

    Good luck and keep us posted (y).
     
    #18 Raytheeagle, Nov 18, 2018
  19. Dom06

    Dom06 New Member

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    I’ve had the same issue on my ‘06 Prius (1310 & 1259 codes) but I just disconnected the 12V battery for about 10 minutes and that cleared the codes and it’s starting again. Anyone else have any luck with this? I’m a bit nervous now.
     
    #19 Dom06, Jun 6, 2019
  20. bisco

    bisco cookie crumbler

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    that just resets the codes, it will be back
     
    #20 bisco, Jun 6, 2019
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