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SPN 3226 FAIL 20 DD15 CASCADIA

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by bunniecarrots, May 30, 2019.

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  1. May 30, 2019 #1
    bunniecarrots

    bunniecarrots Bobtail Member

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    Oct 4, 2009
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    Hello Everyone
    I'm having an issue received SPN 3226 FAIL 20 DD15 CASCADIA, took it to freightliner and they installed an awning kit. Drove about 100 miles and then it called for a forced region and same code EEC 61 FAIL 20 SPN 3226. Have had to regen 4 times in 24hrs. Any help ?
     
    bunniecarrots, May 30, 2019
    bunniecarrots, May 30, 2019
    #1
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  3. May 30, 2019 #2
    mhyn

    mhyn Road Train Member

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    Dec 29, 2008
    Northridge, CA
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    how did you start 4 regens in 24 hours?
     
    mhyn, May 30, 2019
    mhyn, May 30, 2019
    #2
  4. May 30, 2019 #4
    bunniecarrots

    bunniecarrots Bobtail Member

    24
    4
    Oct 4, 2009
    0
    The def light flashed and the check engine light which means it was calling for a forced regen. I did it once and the light was still on, did it again and the light cut off. Then I shut it down and went to bed, and the next day (this morning) I drove 300miles and it did it again (the forced regen), I did a parked regen and it shut off, and then another 300 miles repeated process. Right now I'm at about 250 miles since the last time it happened.
     
    bunniecarrots, May 30, 2019
    bunniecarrots, May 30, 2019
    #4
  5. May 30, 2019 #4
    mhyn

    mhyn Road Train Member

    4,255
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    Dec 29, 2008
    Northridge, CA
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    I see :) Who told you that when def light flashes and check engine is on it's time for regen? Also when you started forced regen you were driving or stopped? What year is your Cascadia?
     
    mhyn, May 30, 2019
    mhyn, May 30, 2019
    #4
  7. May 30, 2019 #5
    bunniecarrots

    bunniecarrots Bobtail Member

    24
    4
    Oct 4, 2009
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    2014 cascadia, and during forced regen was parked.
     
    bunniecarrots, May 30, 2019
    bunniecarrots, May 30, 2019
    #5
  8. May 30, 2019 #6
    mhyn

    mhyn Road Train Member

    4,255
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    Dec 29, 2008
    Northridge, CA
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    ok. during parked forced regen rpm goes to 1100 and stays there from 20min to 1 hours. then rpm goes back. did you see it?
     
    mhyn, May 30, 2019
    mhyn, May 30, 2019
    #6
  9. May 30, 2019 #7
    bunniecarrots

    bunniecarrots Bobtail Member

    24
    4
    Oct 4, 2009
    0
    Yes.
     
    bunniecarrots, May 30, 2019
    bunniecarrots, May 30, 2019
    #7
  10. May 30, 2019 #8
    mhyn

    mhyn Road Train Member

    4,255
    4,513
    Dec 29, 2008
    Northridge, CA
    0
    SPN 3226 FAIL 20 is related to SCR. You may have drifted Nox outlet sensor. Regen process is related to DPF.
     
    mhyn, May 30, 2019
    mhyn, May 30, 2019
    #8
  11. May 30, 2019 #9
    bunniecarrots

    bunniecarrots Bobtail Member

    24
    4
    Oct 4, 2009
    0
    I had both nox sensors replaced 9 months ago. Just dropped off at freightliner for these very same codes, they said it needed and awaining kit. Picked it up, 100 miles drive and the same SPN 3226 FAIL 20 popped right back up.
     
    bunniecarrots, May 30, 2019
    bunniecarrots, May 30, 2019
    #9
  12. May 30, 2019 #10
    mhyn

    mhyn Road Train Member

    4,255
    4,513
    Dec 29, 2008
    Northridge, CA
    0
    that's good they have installed awning kit. Nox sensor can go bad any moment. I had one lasted 4 month on my truck... SCR must be tested to make sure nox sensor is drifted.
     
    mhyn, May 30, 2019
    mhyn, May 30, 2019
    #10
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