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Yellow Low Def light

Discussion in 'Freightliner Forum' started by danny23tx, Dec 7, 2019.

  1. Dec 7, 2019 #1
    danny23tx

    danny23tx Road Train Member

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    Austin,Tx
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    The little yellow light that's warns def is low is stuck on . The Green bars that indicate def level are working , filled up Def and the Bars read full tank but little yellow light still on . Any one have this problem?
     
    danny23tx, Dec 7, 2019
    danny23tx, Dec 7, 2019
    #1
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  3. Dec 7, 2019 #2
    D.Tibbitt

    D.Tibbitt Road Train Member

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    Is it throwing a code? My cascadia used to do that when i would idle alot . Never could find the problem
     
    D.Tibbitt, Dec 7, 2019
    D.Tibbitt, Dec 7, 2019
    #2
  4. Dec 7, 2019 #3
    danny23tx

    danny23tx Road Train Member

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    No codes whatsoever. Gauge works no issues other than the tiny light .
     
    danny23tx, Dec 7, 2019
    danny23tx, Dec 7, 2019
    #3
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  5. Dec 7, 2019 #4
    Roberts450

    Roberts450 Road Train Member

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    How many key cycles have been made since it came on?? Did it get low enough to actually trigger it?

    Thinking it might clear on its own if it got ran low enough to come on but I dont know the FL/DD DEF system at all. My pete just had a red warning light on the gauge when it got below 1/8 of a tank but it would go out when filled above that level.
     
    Roberts450, Dec 7, 2019
    Roberts450, Dec 7, 2019
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  7. Dec 7, 2019 #5
    danny23tx

    danny23tx Road Train Member

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    Austin,Tx
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    Yeah Def went low , I thought it would go away once filled. Probably the second time in 3 years it actually came on , I keep it filled most times . Might on plug Def tank and investigate once I make it home in a week.
     
    danny23tx, Dec 7, 2019
    danny23tx, Dec 7, 2019
    #5
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  8. Dec 7, 2019 #6
    mhyn

    mhyn Road Train Member

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    subscribed.... lol
     
    mhyn, Dec 7, 2019
    mhyn, Dec 7, 2019
    #6
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  9. Dec 7, 2019 #7
    danny23tx

    danny23tx Road Train Member

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    Austin,Tx
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    Any thoughts?
     
    danny23tx, Dec 7, 2019
    danny23tx, Dec 7, 2019
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  10. Dec 8, 2019 #8
    mhyn

    mhyn Road Train Member

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    hook up the DL and check to see you had history fault codes related to aftertreatment that day/time. if not replace the gauge.
     
    mhyn, Dec 8, 2019
    mhyn, Dec 8, 2019
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  11. Jan 24, 2020 #9
    danny23tx

    danny23tx Road Train Member

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    Austin,Tx
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    Cleared up today . Almost 2 months later lol .
     
    danny23tx, Jan 24, 2020
    danny23tx, Jan 24, 2020
    #9
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  12. Jan 30, 2020 #10
    mhyn

    mhyn Road Train Member

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    it may come back again when weather will be hot...
     
    mhyn, Jan 30, 2020
    mhyn, Jan 30, 2020
    #10
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