Inspect Inhibit Switch: Check the DPF regeneration inhibit switch for proper operation. Replace the switch if it is found to be defective. Examine Wiring and Connectors: Inspect the wiring harness and connectors associated with the inhibit switch for signs of damage, corrosion, or loose connections. Repair or replace any damaged components.. All they did was remove the filter and clear the codes. Now I have had the dpf filter cleaned, baked and reinstalled. I cleared the codes and reset the soot load but now I have a regen inhibited light on on the dash and I can't get it to do a forced regen due to the regen inhibit switch "inhibited". The problem is there is no inhibit switch.
SPN 3712 indicates that active regeneration of the DPF has been inhibited due to an inhibit switch being engaged. This usually involves a manual override preventing normal operation. On the other hand, SPN 3714 points to a situation where the DPF is experiencing high temperature conditions during regeneration or is unable to reach its required.. thanks for the WSM information. ive run the tractor for 5 years now. bought it new from a dealer. the dpf inhibit light was always off till recently. now its on on start and stays on, can not turn it off.. the WSM isnt detailed enough to show what powers the light and where the 12v comes from for the dpf inhibit light for the switch..