MX-13 Engine derate

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by VIKT0R, Jan 28, 2022.

  1. VIKT0R

    VIKT0R Bobtail Member

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    Dec 29, 2021
    0
    I have a 2016 Pete with MX-13 with the following codes:

    CECU3 with Chassis Node Aftertreatment system operator inducement severity message error SPN 5246 FMI 19 Count 126

    MX 13 EPA 13 EGR - Shutoff P1496 SPN N/A Count 1

    MX 13 EPA 13 Undocumented Fault - Contact Manufacturer for P1515 details P1515 FMI N/A Count 54

    MX 13 EPA 13 Emission control system - Engine torque derate active P1518 FMI N/A Count 49

    From what I've found so far P1496, P1515 and P1518 are triggered by some other codes and latch after 10 hours. I don't have DAVIE to reset them. I can't find anything on SPN 5246 though. Could it have triggered the rest?
     
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  3. Aamcotrans

    Aamcotrans Heavy Load Member

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    1,499
    May 24, 2016
    Strasburg, Va
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    I have a 17 and the culprit came down to after treatment harness..
    good luck
     
  4. Goodysnap

    Goodysnap Road Train Member

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    Jul 12, 2017
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    Whole lot a nothin for you. No root cause fault listed.

    P1496 once active for 10hrs will set P1495 active and is latched until disabled with the EGR derate disable function. These faults are almost always set for engine related issues- fuel system-EGR-misfire ect......

    P1515 is just speed limitation

    P1518 is always DEF related derate

    Your 5246 only comes up for me in a FMI 14 and crosses to P1516 which is also a Derate- do not TS fault. I have never seen this fault before.

    I see this a lot where someone has connected with a generic tool and hit clear and- Viola everything is gone except the derates. Only thing you can do is disable, clear it and Drive it to see what comes back.
     
  5. VIKT0R

    VIKT0R Bobtail Member

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    Dec 29, 2021
    0
    The driver was at another shop in TN few days ago. Went there to flash his tranny ECU (won't go in gear). They also tried to charge him 5k to replace fuel pump and lambda sensor, because they said it was faulty. I told them to set the truck free if it runs and after 1k miles he came to me. I am not sure what they did there. The driver says the derate started after he left them. Attached is the report of my scan. Unfortunately, I don't have software to reset this latched codes.
     

    Attached Files:

  6. VIKT0R

    VIKT0R Bobtail Member

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    Dec 29, 2021
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