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2010 prius c1259 c1310

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by freebird1, Mar 6, 2022.

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  1. freebird1

    freebird1 Junior Member

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    reading few other posts with these code (change rear wheel hubs),fuel pump issue ,check orange plug
    Im getting these codes after hybrid battery is replaced (green bean warranty)
    before this the engine had to be replaced and no issues with breaks or 12v battery (checked good test)

    the p0a080 refuses to go away even after a new one is put in but this time check hybrid system comes up

    after driving safe to local store used their obd reader to reset fault codes and all back to normal didnot drive few days ,after driving another 10 miles ,two days apart few days later again got check hybrid system ,this time used self obd as i got it delivered

    used panlong obd2 only get p0a080 on torque lite app and did a reset
    check hybrid system is gone


    will see if get another time and it goes away with clear codes ,there could be some other abs issue ?

    the tech who replaced battery said ok to leave the brown plug out ,dont know what that is but the orange plug looks firm ,maybe i should remove and put it back to check if that makes a difference

    P0a080
    c1259
    c1310
     

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    #1 freebird1, Mar 6, 2022
  2. bisco

    bisco cookie crumbler

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    if the orange plug isn't installed correctly, the car won't start.

    idk what the brown plug is, but why would he leave it out?

    if you're getting P0A80, maybe the replacement is bad

    you might need tech stream for the proper codes and sub codes
     
    #2 bisco, Mar 6, 2022
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  3. AzusaPrius

    AzusaPrius Senior Member

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    The HV Battery code is a Permanent code and will need to just be driven and the code will go away on its own.

    Might take 1k miles or so.

    The other two codes will need to be figured out and will have an impact on charging the HV battery.
     
    #3 AzusaPrius, Mar 6, 2022
    Last edited: Mar 6, 2022
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  4. ChapmanF

    ChapmanF Senior Member

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    It's pretty common knowledge here (but still needs the word spread to the new folks) that C1259 and C1310 are simply codes that the skid control ECU sets when it has been told there are trouble codes in the power management control ECU. So literally all those two codes mean is "never mind us, go find out what the trouble codes in the power management control ECU are."

    So anything you read about what different people did to "fix" C1259 or C1310 codes will be coming from people who never quite understood what those codes meant. The reason different things "fixed" those codes was just that those people had different problems to start with, which could be identified by the real trouble codes in the power management control ECU.

    So the key thing you need to investigate here is the P0A80 code you are getting from the power management control ECU, and why that hasn't gone away with your battery replacement. The C1259 and C1310 are only shown because of that.
     
    #4 ChapmanF, Mar 7, 2022
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  5. freebird1

    freebird1 Junior Member

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    update
    got check hybrid system two more times 10 to 60 miles random and both times clear codes back to normal
    reading from panlong obd2 only seeing past old saved code P0a080
    (hybrid battery already replaced and is ok)
    maybe next time should go to better reader mechanic
    dont know when it would go again check hybrid system (random )
     
    #5 freebird1, Mar 12, 2022
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  6. ChapmanF

    ChapmanF Senior Member

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    You say the traction battery is ok.

    P0A80 says it isn't.

    Need to find out who's right.
     
    #6 ChapmanF, Mar 13, 2022
  7. freebird1

    freebird1 Junior Member

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    green bean battery replaced it,I was told it will go away after 1kor2k miles but this codes coming up and check hybrid is random
    when chs showsup car runs all ok on gas engine only and gas engine doesnt stop even if stop so its running all on gas engine
    will try to go to better code reader mechanic next time

     
    #7 freebird1, Mar 13, 2022
  8. ASRDogman

    ASRDogman Senior Member

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    Another great report about the green bean... :whistle:
     
    #8 ASRDogman, Mar 13, 2022
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  9. AzusaPrius

    AzusaPrius Senior Member

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    Can you take a picture of the dash lights?

    The other two codes are preventing the HV battery from charging, so any new battery will drain.

    Remember the permanent code for the hybrid battery will go away after 1k miles or so.

    I had the same codes and once I changed the rear wheel hubs with speed sensors the battery was able to charge again and then eventually the permanent code went away.

    You should look into a Carista OBD adapter and then download the free app Dr. Prius.
     
    #9 AzusaPrius, Mar 13, 2022
  10. ChapmanF

    ChapmanF Senior Member

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    What the C1259 and C1310 codes mean is explained in the repair manual (and repeated in #4). What post hoc ergo propter hoc means is explained here.
     
    #10 ChapmanF, Mar 13, 2022
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  11. freebird1

    freebird1 Junior Member

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    used another app and got different codes ,yesterday when at autozon code reader still only get p0a80 but not these new codes
    car starts ok and all good ,the check hybrid system message may show up again driving 10miles to 50miles dont know when next time

    new codes after start car and using car scanner elm app
    from another post

    >>U0155 =>means nothing ?
    >>B2784 is on a different topic, the connection between the Smart Key certification ECU and the key transponder built into the power switch. There are three pages in the repair manual to help troubleshoot that.

    ====================================
    Car Scanner ELM OBD2
    DTC report
    Selected brand: Toyota
    VIN: JTDxxx
    ============1==============
    P0A80
    Raw code: 0A80
    ECU: 7EA
    Status: Pending
    OBDII: Hybrid battery pack Deterioration
    ============2==============
    B2784
    Raw code: A784
    ECU: Entry & start / Smart key
    Status: Confirmed
    ============3==============
    U0155
    Raw code: C155
    ECU: Entry & start / Smart key
    Status: Confirmed
    OBDII: Data bus, instrumentation control module - no communication

    ==============================================================
     
    #11 freebird1, Mar 14, 2022
  12. ChapmanF

    ChapmanF Senior Member

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    It means whichever ECU reported that code can't communicate with the instrument cluster combination meter.

    The ECUs that can report a U0155 are the power management control ECU, the main body ECU, the certification ECU (smart key), and the air conditioning amplifier.

    Not every code scanning app shows which ECU the code was reported by. I see that your Car Scanner app does, which is a plus for that app in my book. It shows "ECU: Entry & start / Smart key" for your U0155, so probably that was the certification ECU.

    Edit: yeah, it was, because Car Scanner shows the same "ECU: Entry & start / Smart key" for the B2784 code, and the certification ECU is the one that reports that code.

    Could somebody have bumped the connectors plugged into your certification ECU? One ECU is suddenly saying both "hey! where's the combination meter?" and "hey! where's my antenna coil?"
     
    #12 ChapmanF, Mar 14, 2022
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  13. freebird1

    freebird1 Junior Member

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    looking around for codes get few links to pdfs but
    unable to open pdfs which are being blocked by browser hsts

    found below ,if this is something can be found any online pdf can download ?
    will go to local mechanic if its complicated work
    B2784 TOYOTA: Code Meaning, Causes, Symptoms, & Tech Notes
    When is the B2784 TOYOTA code detected?
    Antenna coil is open/short
     
    #13 freebird1, Mar 14, 2022
  14. ChapmanF

    ChapmanF Senior Member

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    The place to look is the Repair Manual (more info). Some people manage to find already-assembled PDFs of that; if you do, it's a lot more convenient than searching for individual bits and pieces when you need them.

    There are some members here who might send a relevant section if they see your post.

    If your browser has saved a certificate for a website using HSTS, and the site changes certs and you're sure nothing nefarious is involved, there's usually a way in the browser to forget the old cert.
     
    #14 ChapmanF, Mar 14, 2022
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  15. freebird1

    freebird1 Junior Member

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    Last mechanic replaced engine wasn't even 500 miles driven this issue started


    Will go back to him

    Is this a wiring issue
    Need to open up Ecu ?

     
    #15 freebird1, Mar 14, 2022
  16. ChapmanF

    ChapmanF Senior Member

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    More likely wiring, less likely need to open any ECU.

    Diagnosing communication errors can be fiddly. Best advice, get access to repair manual, find sections for those trouble codes, follow the troubleshooting steps given there.
     
    #16 ChapmanF, Mar 15, 2022
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  17. freebird1

    freebird1 Junior Member

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    found this video when looking for ecu prius its gen2


    dont know where these are on gen3 ,


    B2784
    found from repair manual
    possible issues

    >REPAIR OR REPLACE HARNESS OR CONNECTOR
    >REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
    >(POWER SWITCH WAS DEFECTIVE)
     

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    #17 freebird1, Mar 16, 2022
  18. freebird1

    freebird1 Junior Member

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    Is this the harness and ecu to check for b2784
    Checked cabin air filter ok no rodent infestation
     

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    #18 freebird1, Mar 20, 2022
  19. ChapmanF

    ChapmanF Senior Member

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    The lower rightmost ECU there, the one whose case is blue.
     
    #19 ChapmanF, Mar 20, 2022
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  20. freebird1

    freebird1 Junior Member

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    have wiring document but cant figure out which of those is the L43 powerswitch
    Edit
    found another document electrical wiring routing not in original zip download by looking around online
    this is in another location ?

    I will have to wait for mechanic availability
     

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    #20 freebird1, Mar 20, 2022
    Last edited: Mar 20, 2022
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