I wonder if anyone can shed some light. I have read about successful DPF forced regens using ForScan, but it isn't working for me and I am confused as to why.
The vehicle is a 2011 Transit Minibus, 2.2 l (euro V), 140 PS. The powertrain light came on towards the end of a motorway run and "engine malfunction" on the display. It has been present on every startup since - and limp mode (forced restricted power) is enabled. I bought a ELM327 USB interface and downloaded ForScan. The error codes were mainly to do with DPF soot accumulation and one relating to vaporiser glow plug circuit. Needless to say, the regen would not proceed. I was told that the vaporiser glow plug was a dealer only part. The dealer offerred me a vaporiser assy complete, saying the glow plug alone was not available (contrary to information on Ford-Etis). Anyway, after spending close to £270 and three days trying to undo the vaporiser mounting nut, I managed to replace the vaporiser. Ran ForScan, cleared DTC's and re-ran diagnostics. Pleased that the vaporiser glow plug circuit error had cleared, I was left with only the codes relating to DPF soot accumulation and restricted power. I took the vehicle for a short run, to warm up the engine somewhat quicker than just by idling. Upon return, hooked up the interface and laptop and proceeded to start the forced regen. It did not proceed, informing that engine temperature and exhaust gas temperature are too low. I took the vehicle on a 50 mile run down the motorway maintaining an almost constant 70 mph. Upon my return, attempted the forced regen. Exactly the same cause of interruption!! The coolant temperature was above 80 degC (otherwise Forscan would have reported it). ForScan indicated that the oil temperature was 91 degC. I can understand that the exhaust gas temp sensor might have been reading low due to soot (??) but why would the engine temp sensor suggest below 70 degC when both the coolant and oil temperatures were well above that? What is the location of the engine temp Sensor? Performing a self test with Forscan did not highlight any faulty sensors. Anyone got any suggestions? Many thanks.