Hi everyone I am new to this forum thing so hang in there. I recently purchased a 2016 Kioti CK 3510 that was a leftover with only 10 hrs on it. Once delivered I did a once over on it and everything seemed great second day I owned it took it out and tilled a couple acres for food plots ran it around 2600 rpm no problems...the next day took it out and brush hoged for a couple of hours and probably had the rpms around 2200-2400 got back to the barn looked down and the CEL light was on shut the tractor down waited a bit started back up no CEL light I cleaned the air filter and the radiator screen thinking maybe just got filled it grass and stuff. The next day started grading my drive way running between 2400-2600 rpm after a few hours the CEL light came back on shut it down fired it back up no light thought maybe it need to Regen at this point it had 20 hrs on it . The Regen would start for a couple minutes then the CEL light come back on and stopped the regen. I waiting until the next day went out started it and tried the regen again this time it ran through blowing out some awful smoke and smelled aweful. Thought I had the cure well the next day a fired it up and went to idle up to 2400 rpm and it started sputtering and blowing g smoke for a couple minutes then ran fine but eventually the CEL light came on again...I'm puzzled any ideas of what is going on?