Cummins ISB eng.code 2777 Inhibited ?

Discussion in 'Trucks [ Eighteen Wheelers ]' started by habfleet, Jan 16, 2021.

  1. habfleet

    habfleet Light Load Member

    Feb 5, 2012
    elwood nj
    I have been working on a 2012 Freightliner med duty Vin#FB1187 with a cummins ISB epa 10 2250 Ser#73409156. The trk comes to the shop with checkengine light on after about a month of driving. Soot levels are high . Run force regen and a afttertreatment regen analyzer test which it passes. Can not clear code 2777 "regen inhibited due to inhibited condition exists " and code 3753 . The vehicle will not passive regen thats why it is back every month .Went into Parameters and see the inhibited switch is disabled. I can find nothing wrong with the trk to lead to why it will not passive regen. Any ideas of what I may be missing ? Thanks
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