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DEF light flashing

Discussion in 'Experienced Truckers' Advice' started by Cw5110, Feb 4, 2016.

Page 1 of 4
  1. Feb 4, 2016 #1
    Cw5110

    Cw5110 Heavy Load Member

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    Oct 19, 2013
    Georgia
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    I have a 2014 KW 680 and my DEF light is flashing even with a full tank. Its been doing this on and off since the year started Ive done two manual regens and it still does it. Any ideas??
     
    Last edited: Feb 4, 2016
    Cw5110, Feb 4, 2016
    Cw5110, Feb 4, 2016
    #1
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  3. Feb 4, 2016 #2
    ladr

    ladr Road Train Member

    1,383
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    Apr 14, 2013
    GA
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    Truck still under factory coverage?

    Sounds like a bad sensor or the filter needs servicing.
     
    ladr, Feb 4, 2016
    ladr, Feb 4, 2016
    #2
  4. Feb 4, 2016 #3
    truckthatpassesyouby

    truckthatpassesyouby Road Train Member

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    Jun 3, 2015
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    Are you idling a lot?
     
    truckthatpassesyouby, Feb 4, 2016
    truckthatpassesyouby, Feb 4, 2016
    #3
  5. Feb 4, 2016 #4
    Hick

    Hick Heavy Load Member

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    Dec 4, 2014
    West Virginia
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    When the 700 I was driving did this, they had to replace the exhaust pressure sensor and update the ECM.
     
    Hick, Feb 4, 2016
    Hick, Feb 4, 2016
    #4
  7. Feb 4, 2016 #5
    Cw5110

    Cw5110 Heavy Load Member

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    Oct 19, 2013
    Georgia
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    I would guess its under warrenty its a company truck. I idle when it hits below 25 degrees outside i did idle during the snowstorm in the east for 2 days. But even so it wasnt flashing then. Other than that I havent idled too much this year. I forgot too mention its a paccar mx 315xxx on mileage.
     
    Last edited: Feb 4, 2016
    Cw5110, Feb 4, 2016
    Cw5110, Feb 4, 2016
    #5
  8. Feb 4, 2016 #6
    Final Drive

    Final Drive Road Train Member

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    Jan 21, 2015
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    Sorry to hear OP
    Your computer thinks your DEF tank is empty , you better get that fixed as soon a possible before it shuts you down.
     
    Final Drive, Feb 4, 2016
    Final Drive, Feb 4, 2016
    #6
    Straight Stacks and Cottonmouth85 Thank this.
  9. Feb 4, 2016 #7
    Sipesh

    Sipesh Medium Load Member

    617
    1,101
    Apr 3, 2014
    Colorado
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    It will derate you or shut off the truck if you don't take care of it soon enough for the truck's liking. My friend has your same truck, and it's already had to go in for the same thing, as well as MULTIPLE software updates.
     
    Sipesh, Feb 4, 2016
    Sipesh, Feb 4, 2016
    #7
  10. Feb 4, 2016 #8
    d281833

    d281833 Heavy Load Member

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    May 15, 2012
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    There's a couple of filters that have to be serviced usually around 150k Could be the sensor is letting you know. The DEF crystallizes after awhile.
     
    d281833, Feb 4, 2016
    d281833, Feb 4, 2016
    #8
  11. Feb 4, 2016 #9
    Cw5110

    Cw5110 Heavy Load Member

    875
    927
    Oct 19, 2013
    Georgia
    0
    Well after reading comments. Apperantly my engine doesnt want too work anymore. Therefore i am in need of a tow.
     
    Cw5110, Feb 4, 2016
    Cw5110, Feb 4, 2016
    #9
  12. Feb 4, 2016 #10
    d281833

    d281833 Heavy Load Member

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    May 15, 2012
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    Nah, I think the boys are just givin' ya a heads up. Drive'er like ya stole'er hand.
     
    d281833, Feb 4, 2016
    d281833, Feb 4, 2016
    #10
    Cottonmouth85 Thanks this.
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