c-mac Posted September 16, 2016 Share Posted September 16, 2016 Sometime after making an aftertreatment repair and run a manual regen, The lightning bolt remains on and guard dog states Evaluating DEF quality engine in derate 5 mph limit removed. All dtc's clear out except, ECM-4094-1. stating dtc has to be stored 400 days by law and to put back in service, in a nutshell. normally if the repair took care of the problem the warning would go away in a few hundred miles, and sometimes not, and I'd have to dig deeper. Anyway I'd like to know if there is any way to turn the lightning bolt off and stop the "Evaluating" warning from popping up. Some drivers won't take the trucks out in this condition. Quote Link to comment Share on other sites More sharing options...
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