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regen failed due to low temp dtc 3711, dd15

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by RTR tech, Mar 18, 2018.

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  1. Mar 18, 2018 #1
    RTR tech

    RTR tech Bobtail Member

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    Mar 18, 2018
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    Tractor was towed in with engine warnings on, and in shutdown mode.Active faults for soot level high, and failed regen. due to temp. Inlet DOC temp only at 425, wont go high enough to start dosing fuel. Intake throttle valve is working. Will continue on diag tomorrow. Any thoughts? Thanks.
     
    RTR tech, Mar 18, 2018
    RTR tech, Mar 18, 2018
    #1
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  3. Mar 19, 2018 #2
    QUALITYTRUCK

    QUALITYTRUCK Road Train Member

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    romulus,mi
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    Come on guys!!!! For the millionth time year/make/model/engine.
     
    QUALITYTRUCK, Mar 19, 2018
    QUALITYTRUCK, Mar 19, 2018
    #2
    Goodysnap and daf105paccar Thank this.
  4. Mar 19, 2018 #3
    Antinomian

    Antinomian Road Train Member

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    Is the EGR valve working?
     
    Antinomian, Mar 19, 2018
    Antinomian, Mar 19, 2018
    #3
  5. Mar 19, 2018 #4
    Freddy57

    Freddy57 Road Train Member

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    Mount Vernon, MO
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    Sounds like EGR stuck open.
     
    Freddy57, Mar 19, 2018
    Freddy57, Mar 19, 2018
    #4
  7. Mar 20, 2018 #5
    RTR tech

    RTR tech Bobtail Member

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    Mar 18, 2018
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    Sorry about that. Sent from home and not fully thinking. Tractor is 2013 Freightliner Cascadia with Detroit DD15. A little over 500k miles. Not a lot of history as far as aftertreatment work done.
     
    RTR tech, Mar 20, 2018
    RTR tech, Mar 20, 2018
    #5
  8. Mar 20, 2018 #6
    bryan21384

    bryan21384 Road Train Member

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    Memphis, TN
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    That dpf may be clogged. It may may need cleaning. When the soot levels get too high, the truck will either have short regens or none at all. They'll have to take it off and bake the filter or how ever they clean it. You'll be down for at least 12 hrs.
     
    bryan21384, Mar 20, 2018
    bryan21384, Mar 20, 2018
    #6
  9. Mar 23, 2018 #7
    RTR tech

    RTR tech Bobtail Member

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    Mar 18, 2018
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    Found the problem Reached a step in diag instructions to inspect valve adjustment. The engine brake solenoid on front section had come loose and was popped up out of position. After replacing O-rings, tractor did complete regen with good temps. Tractor had some work under valve cover a couple of months ago. Looks like this screw didn't get tightened enough. Thanks to all for your input.
     
    RTR tech, Mar 23, 2018
    RTR tech, Mar 23, 2018
    #7
    QUALITYTRUCK and Jazz1 Thank this.
  10. Mar 23, 2018 #8
    Jazz1

    Jazz1 Road Train Member

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    Thunder Bay On
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    Good job finding something simple. Had similar issue with my own vehicle recently. Bolt on EGR tube had fallen out and making the engine somewhat erratic
     
    Jazz1, Mar 23, 2018
    Jazz1, Mar 23, 2018
    #8
  11. Sep 1, 2021 #9
    mccoy12

    mccoy12 Bobtail Member

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    Sep 1, 2021
    0
    i have a 2015 cascadia dd15. has a 3719 fault.. both dpf filters have been replaced. dozer injector has been replaced. exhaust temps are only reaching 460 degrees.which isnt high enough to starting adding fuel on the downstream. trottle valve is working properly. egr valve is not stuck. any ideas?
     
    mccoy12, Sep 1, 2021
    mccoy12, Sep 1, 2021
    #9
  12. Sep 1, 2021 #10
    Antinomian

    Antinomian Road Train Member

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    Here's a link to the service bulletin: CPC4 SPN 3719/FMI 0, 16 - GHG1 .
    You may need a new CPC4.

    Are there no other codes?
     
    Antinomian, Sep 1, 2021
    Antinomian, Sep 1, 2021
    #10
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