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2010 Prius will not start engine codes u0100 c1259 c1310

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by jakester21, Nov 27, 2023.

  1. jakester21

    jakester21 Junior Member

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    hey i've been beating my head on this Prius for a while but its not giving me much to work off of
    the car will not turn the engine over it will go in electric for a few seconds and the miles per hour disappears and i hear the relays in the battery turn off also tech stream says my engine rpm is 16000 and it cant connect to the emc
    there has been mice in the car so that could be some thing i have tech stream and carista and dr prius and torque

    things i've checked
    high voltage battery on dr Prius everting seams normal in the app
    the wires look good where the cabin air filter is
    checked the service plug on high voltage battery
    checked all the fuses they are good
     
  2. bisco

    bisco cookie crumbler

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    how many miles on her?

    any trouble codes?
     
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  3. jakester21

    jakester21 Junior Member

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    thanx for the reply i guess my picture didnt upload trouble codes are
    u0100 c1259 c1310 and some more on the picture i dont know if they are related
     

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  4. jakester21

    jakester21 Junior Member

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    it has 200k miles
     
  5. bisco

    bisco cookie crumbler

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  6. jakester21

    jakester21 Junior Member

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  7. bisco

    bisco cookie crumbler

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    Sorry, I was looking at your model year instead of the thread title.
    I’m sure they’re very similar, but I’ll try to find some gen 3 links
     
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  8. jakester21

    jakester21 Junior Member

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  9. bisco

    bisco cookie crumbler

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    everything i can find, it is the same for all cars. not enough voltage at the ecm. start with a load test on the 12 volt, then you're going to have to trace the wiring harness. after that, it's a bad ecm
     
  10. jakester21

    jakester21 Junior Member

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    thank you for all your help i think i got it working i unplugged the 12v battery from the fuse box the white wire then i unplugged the engine control module under the hood by the fuse box and plugged it back in and also charged the 12v battery then i started the car and it worked just fine. i hope this helps other people with the same problem. i also found out the engine water pump is bad maybe that disabled the engine control module so it would not over heat the car?