Hello all, first time posting. Hope someone can help me. 2019 mule 4010 trans. 170 hours. About 2 months ago the dfi light came on, and mule started running in limp mode. Turned it off, cranked back up and it was off. Did this another time or two till one day it came in and stayed on for 20 or 30 min. Next day off again for a few min then back on. Took to dealer and they said the cover on the throttle was bent a little and causing the throttle to stick some, causing a bad reading in the sensor and the dfi light to come on. Fixed that and for the last few weeks it’s run fine. Used it all this past weekend at the farm going thru mud and briars and all that. No issues. Used it tonight and it worked fine until about 30 min later when I cranked it up it came on. The only difference was there was now a few hundred pounds in the bed. Limped it back to the truck, turned it off, took the load out and cranked it back up. Light was off and stayed off another 5 min or so till I loaded it back on the trailer. Never came back on. With this off and on at random times, doesn’t seem like an issue with the coil or anything like that. Seems like something with the sensor. Has any one experienced something like this before? Thanks!

 

I'm having the same issue. I've cleaned the entire fuel system.... Fuel Pump, Cleaned the Tank out, Cleaned the Fuel Rail, Cleaned Injectors, Added fresh fuel. It did make the idle a bit better instead of sounding like it was running on 1 cylinder. Put new spark plugs in also as they were pretty fouled but has spark on both and changed the oil and oil filter. DFI light came on then went off at low Idle but came back on when you hit the throttle. Now it's staying on. Not sure what else to check on it. Just wondering if you ever found a solution to yours?

 

Plus I forgot to mention it only has 50 hours on it