Car sometimes doesn't start C1241 C1242 C2318

Discussion in 'Gen 2 Prius Audio and Electronics' started by Muhammed Erguder, Oct 7, 2018.

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  1. Muhammed Erguder

    Muhammed Erguder New Member

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    2008 Prius
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    II
    Hello,

    I have a 08 Prius at 111k. It SOMETIMES doesn't start until I jump start. I bought the battery from Pep Boys on September 2017. I went to Pep Boys and dealer to test the battery condition, they both say the battery is perfect. I checked all the fuses, none of them is blown but some of them are a little burned on sides, like AM2 fuse ("IGN" fuse, ignition system). I replace the fuse with spare fuse, but I'm still getting the codes. I used my Bluedriver scanning tool and here are the codes:

    ----Confirmed Trouble Codes Scan Report---- 0 Confirmed Trouble Codes Trouble Codes:
    ----Pending Trouble Codes Scan Report---- 0 Pending Trouble Codes Trouble Codes:
    ----Permanent Trouble Codes Scan Report---- 0 Permanent Trouble Codes Trouble Codes:
    ----Transmission Control Codes Scan Report---- 1 Transmission Control Trouble Codes:
    1. C2318
    Low Voltage Error (Power Supply Malfunction)
    ----Antilock Brake System Codes Scan Report---- 2 Antilock Brake System Trouble Codes:
    1. C1241
    Low or High Power Supply Voltage
    2. C1242
    Open circuit in IG1/IG2 Power Source Circuit

    Please help,
    Thank you...
     

    Attached Files:

    #1 Muhammed Erguder, Oct 7, 2018
  2. SFO

    SFO Senior Member

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    Welcome to PriusChat!!

    How often/far do you drive this vehicle?

    Sounds like you are having 12v issues, and should look into potentially replacing the burnt fuses once you're done with the workup for the thrown DTCs.

    You will notice how you can narrow down some of the workup (below) by having the required 'detailed codes' for your thrown DTCs. Does your Bluedriver code reader supply the needed INFs or 'detailed codes' ??

    Here is the workup for C1241 and C1242:

    https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/Prius%20Service%20Manuals%202004/%E4%BF%AE%E7%90%86%E6%89%8B%E5%86%8C/04pruisr/05/21avn/cic12414.pdf


    And for C2318:

    https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/Prius%20Service%20Manuals%202004/%E4%BF%AE%E7%90%86%E6%89%8B%E5%86%8C/04pruisr/05/21age/cic2318.pdf

    Without the INFs (detailed codes), the job of isolating DTCs C1241 and C1242 become more time consuming.
     
    #2 SFO, Oct 8, 2018
    Raytheeagle likes this.
  3. Muhammed Erguder

    Muhammed Erguder New Member

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    Location:
    Pittsburgh
    Vehicle:
    2008 Prius
    Model:
    II
    I drive every day and 30k per year.

    Bluedriver does not have that feature. How do I get the detailed code?

    Thank you very much.
     
    #3 Muhammed Erguder, Oct 9, 2018
  4. bisco

    bisco cookie crumbler

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    measure the 12v with a voltmeter, after the car has been off a few hours
     
    #4 bisco, Oct 11, 2018
  5. Howie Snyder

    Howie Snyder New Member

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    Muhammed, I'm having a similar issue. What fixed your issue? Let me know - thank you!
     
    #5 Howie Snyder, Apr 29, 2019
    2004priusgal likes this.
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