ISX15 Emissions Codes

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by JohnIC, May 15, 2024.

  1. JohnIC

    JohnIC Bobtail Member

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    Dec 24, 2023
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    Have a list of codes I pulled up from key on/off and need help on this one. See attached list of codes with their descriptions. Where do I start?
    To me it feels like like NOx sensors are out of range from other codes, essentially its a chain reaction here.
     

    Attached Files:

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  3. Goodysnap

    Goodysnap Road Train Member

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    Enter the codes that happened within the last 25 operating hours into the fault code analyzer on QSOL. This will put the codes in the recommended order to troubleshoot. Generally focus on active codes or codes with higher counts. Do not bother with any older codes and that are 1 count only and inactive status.

    Keep in mind if you’re using Insite, The last code that changed status from active to inactive will be on the bottom of the list. So if no codes are active the most recent is at the bottom. Timestamps are the key.
     
    Otr Traveler Thanks this.
  4. JohnIC

    JohnIC Bobtail Member

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    Dec 24, 2023
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  5. JohnIC

    JohnIC Bobtail Member

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    Dec 24, 2023
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    I don't have insite. Seems like I need one to avoid chasing the tail with heavy price tag. Until I get one, if there is a way without it (from key on/off)? I do have message saying "SCR/FPF service required".
     
  6. Goodysnap

    Goodysnap Road Train Member

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    With what I know I would begin with 3232 code. Most commonly a wiring issues to the Nox sensors and controller. Sensors are not common for the codes. ECM is not communicating with the component. Check Power and ground to both sensors.
     
    Otr Traveler Thanks this.
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