Particulate Trap Active Regeneration Inhibited Due to Permit Switch - Condition Exists. Aftertreatment System: CODES: Fault Code: 2777. PID(P), SID(S): 390. Consult with the OEM if the aftertreatment system has failed due to the permit switch. Read More: SPN 81 - FMI 16 (Fault Code 2754) SPN 110 - FMI 31 (Fault Code 2646, 2659) Blog.Teknisi.. Cummins ISX15 CM2250 (2010-12) Fault Code: 6416 PID: SPN: 3703 FMI: 31 Aftertreatment Regeneration Inhibited Due To Inhibit Switch - Condition Exists. Circuit Description The original equipment manufacturer (OEM) can install a permit switch in the dash or send an inhibit message via the J1939 data link to the engine control module (ECM). The.
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That the truck will not regen because regen is inhibited due to inhibited switch condition exists. I check in the engine parameters and the switch is disabled . Run a regen aftertreatment analyzer test and it passes and runs great for a couple of weeks returns with high soot levels because it will not regen normally . I can not find anything.. What causes a SPN 3712 - Diesel Particulate Filter Active Regeneration Inhibited Due to Inhibit Switch ? The SPN 3712 code is triggered primarily by issues related to the inhibit switch in the diesel particulate filter (DPF) system. This switch can be intentionally activated, halting the regeneration process when conditions aren't ideal for.