Check engine lights on and Truck won’t go over 55mph

Discussion in 'Ask An Owner Operator' started by NewbieTruck, Apr 26, 2021.

  1. NewbieTruck

    NewbieTruck Bobtail Member

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    Jul 28, 2020
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    Hi Guys,

    I am having issues with my truck past month. Almost every week my trucks both check engine lights are on and Regen light is on. I took it to Frieghtliner dealer few times and they fixed it at the times, but it’s coming back on almost every week. Has anyone faced issues like this? What should I do? Please help.
     
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  3. kemosabi49

    kemosabi49 Trucker Forum STAFF Staff Member

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  4. runningman0661

    runningman0661 Road Train Member

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    It’s called a derate, keep driving and ignoring the check engine light, and you want go over 5mph.
     
  5. slow.rider

    slow.rider Road Train Member

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    Did you do a parked regen?
     
  6. drivinhome

    drivinhome Light Load Member

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    Sep 16, 2009
    Southeastern Mass
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    Your DPF is most likely getting clogged. You cannot ignore regens. It could be many things but don’t put it off. It will cost you much more if you do.
     
  7. mitmaks

    mitmaks Road Train Member

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    If its your truck and no warranty I'd advise "tuning" it
     
  8. danny23tx

    danny23tx Road Train Member

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    I would check sensor wires for breaks in them or if any of the outliner is rubbed off . The up and down stream sensors and also check to see what codes are being thrown. Just a matter of time until a complete derate.
     
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