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Engine derate in 3 hrs, seek service immediately!

Discussion in 'Kenworth Forum' started by kestrel1, Aug 26, 2020.

Page 3 of 4
  1. Sep 23, 2020 #21
    kestrel1

    kestrel1 Bobtail Member

    35
    10
    Jan 1, 2009
    Sacramento, CA
    0
    Yes, that’s what it’s looking like. Just called Cummins for harness price. $11k!!
    This is outrageous
     
    kestrel1, Sep 23, 2020
    kestrel1, Sep 23, 2020
    #21
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  3. Sep 23, 2020 #22
    Antinomian

    Antinomian Road Train Member

    1,936
    2,936
    Feb 17, 2013
    0
    That can't be right. Make sure you can describe exactly which harness you need and call a dealership.
     
    Antinomian, Sep 23, 2020
    Antinomian, Sep 23, 2020
    #22
  4. Sep 23, 2020 #23
    kestrel1

    kestrel1 Bobtail Member

    35
    10
    Jan 1, 2009
    Sacramento, CA
    0
    It’s the main harness from ecm. There isn’t a branch off harness. They said I need whole harness as all we know is short is somewhere between ecm and dpf differential pressure sensor. So it could be anywhere
     
    kestrel1, Sep 23, 2020
    kestrel1, Sep 23, 2020
    #23
  5. Sep 23, 2020 #24
    Antinomian

    Antinomian Road Train Member

    1,936
    2,936
    Feb 17, 2013
    0
    The main harness from the ECM on my last truck, a DD15/Cascadia, was $408.
     
    Antinomian, Sep 23, 2020
    Antinomian, Sep 23, 2020
    #24
  7. Sep 23, 2020 #25
    kestrel1

    kestrel1 Bobtail Member

    35
    10
    Jan 1, 2009
    Sacramento, CA
    0
    There’s a big difference there
     
    kestrel1, Sep 23, 2020
    kestrel1, Sep 23, 2020
    #25
  8. Sep 23, 2020 #26
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

    1,780
    1,726
    Jun 14, 2009
    romulus,mi
    0
    That harness is around 3k. Much labor involved. Chances are the issue is closer to the sensor than the ECM. Find a mechanic who has troubleshooting ability. This issue is not that hard to remedy.
     
    QUALITYTRUCK, Sep 23, 2020
    QUALITYTRUCK, Sep 23, 2020
    #26
  9. Sep 23, 2020 #27
    speedyk

    speedyk Road Train Member

    1,837
    2,465
    Apr 8, 2015
    0
    In my limited experience, a paccar with cummins will throw that apocalyptic warning if the def gets lower than it likes, then forget it (at least on the dash) when the def is filled.

    As said above, keep it full. I don't let mine drop much below half and I no longer get the warnings. I also have a mental list of def pumps that will let me fill it to the brim by pulling yhe nozzle out a bit.
     
    speedyk, Sep 23, 2020
    speedyk, Sep 23, 2020
    #27
  10. Sep 23, 2020 #28
    kestrel1

    kestrel1 Bobtail Member

    35
    10
    Jan 1, 2009
    Sacramento, CA
    0
    the only codes which are problem are the dpf differential pressure sensor codes. The other codes are inactive codes in regards to the def running low and the nox sensor
     
    kestrel1, Sep 23, 2020
    kestrel1, Sep 23, 2020
    #28
  11. Sep 23, 2020 #29
    kestrel1

    kestrel1 Bobtail Member

    35
    10
    Jan 1, 2009
    Sacramento, CA
    0
    I believe he’s troubleshooting correct way. Going though the harness and all connectors. But this is just a really unique issue with the volts dropping down as soon as I turn sharp right. I got that price directly from another guy who goes though Cummins got parts. I’m in CA so I would imagine that they have a markup on prices but that sounds way overpriced. Let me see if I can get a part # on that crazy overpriced harness. It’s a 2016 KW T880 with ISX15
     
    kestrel1, Sep 23, 2020
    kestrel1, Sep 23, 2020
    #29
  12. Sep 23, 2020 #30
    speedyk

    speedyk Road Train Member

    1,837
    2,465
    Apr 8, 2015
    0
    I dunno about codes, not allowed to wrench here, we run 389's and know to keep the def topped.
    For me 3/8 tank is minimum.
     
    speedyk, Sep 23, 2020
    speedyk, Sep 23, 2020
    #30
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