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Cummins ISX EGR Error

Discussion in 'Trucks [ Eighteen Wheelers ]' started by tallmon, May 31, 2015.

Page 1 of 2
  1. May 31, 2015 #1
    tallmon

    tallmon Medium Load Member

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    Just starting getting these codes about a week ago. No other issues. 2007 Kenworth T600, Cummins ISX.

    They come in pairs:
    Exhaust Gas Recirculation (EGR) Valve #1 Mechanism
    Mechanical system not responding properly
    128/146/7

    Engine Exhaust Gas Recirculation (EGR) Valve Control
    Mechanical System Not Responding Or Out Of Adjustment
    0/2791/7

    EGR Valve Dirty? EGR Position Sensor? Actuator?

    Thanks.
     
    tallmon, May 31, 2015
    tallmon, May 31, 2015
    #1
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  3. Jun 2, 2015 #2
    bjytech

    bjytech Light Load Member

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    Nov 9, 2013
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    Sounds like either the EGR valve actuator going out or a dirty/sticking EGR valve.
     
    bjytech, Jun 2, 2015
    bjytech, Jun 2, 2015
    #2
  4. Jun 2, 2015 #3
    tallmon

    tallmon Medium Load Member

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    My thoughts, too. Is it all one unit or can they be disassembled?
     
    tallmon, Jun 2, 2015
    tallmon, Jun 2, 2015
    #3
  5. Jun 2, 2015 #4
    bjytech

    bjytech Light Load Member

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    It's serviced as a unit.
     
    bjytech, Jun 2, 2015
    bjytech, Jun 2, 2015
    #4
  7. Jun 2, 2015 #5
    Heavyd

    Heavyd Road Train Member

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    EGR valve likely failed. Usually see them stuck open. Valves are not serviceable. Make sure to have your ECM calibration level checked. There have been many software updates to help with reliability and increase valve longevity.
     
    Heavyd, Jun 2, 2015
    Heavyd, Jun 2, 2015
    #5
    tallmon Thanks this.
  8. Jun 2, 2015 #6
    Snailexpress

    Snailexpress Road Train Member

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    Rocky
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    You can take EGR out and clean it. sometime it helps.
     
    Snailexpress, Jun 2, 2015
    Snailexpress, Jun 2, 2015
    #6
    clm3 Thanks this.
  9. Jun 2, 2015 #7
    Snailexpress

    Snailexpress Road Train Member

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    Rocky
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    One more question.
    When codes are ON, immediately after key is ON or while driving ?
    If while driving or engine running (not right after key is ON) there is a big chance you have J1939 problem.
    Cummins ECM use J1939 (twisted pair yellow and green wires) to communicate with turbo actuator, EGR actuator, vehicle ECM, transmission. Every key ON ECM commands EGR to perform self calibration strokes. If there is no codes at this time actuator is probably OK. Take EGR out, clean it, check electrical plug.
    Also check ECM electrical plugs. Do you like to wash engine with pressure washer?
     
    Snailexpress, Jun 2, 2015
    Snailexpress, Jun 2, 2015
    #7
  10. Jun 3, 2015 #8
    tallmon

    tallmon Medium Load Member

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    Code comes on when under heavy load. Driver does the same route every day and I know from the route when he's going to get the code because there's a couple of big hills there.

    It's the original EGR Valve - 7 years old and 1.2 million miles.

    I'm going to replace it. I'll take a look at old one and see how crusty it is. Is there a way to test the old one outside of the engine - by applying voltage to the actuator leads?
     
    tallmon, Jun 3, 2015
    tallmon, Jun 3, 2015
    #8
  11. Jun 3, 2015 #9
    Heavyd

    Heavyd Road Train Member

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    The video is of a CM871 ISX with DPF. The OP has a CM870 EGR only. He has a different valve which is on the other side of the engine.
    tallmon, I would call Cummins and ask if there is any sort of prize, because one of their original EGR valves lasting 7 years must be some sort of record!!! Congratulations! LOL!
     
    Heavyd, Jun 3, 2015
    Heavyd, Jun 3, 2015
    #9
    GrapeApe Thanks this.
  12. Jun 3, 2015 #10
    tallmon

    tallmon Medium Load Member

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    I'll have to double check this weekend when I take it out.
     
    tallmon, Jun 3, 2015
    tallmon, Jun 3, 2015
    #10
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