P2002 DPF Efficiency Monitor. Does it ask you to do a parked regen??? Where’s your soot level gauge measure at?? You can post a picture
I had the same code 200200 . The truck was running fine but wasn't able to do a parked regen cos it was saying temporary lock out.Took it to the dealer and the only thing that they found out was the hose that goes to the differential pressure sensor had more soot than usual. Check engine light gone now. So if you get this code you should try that too first. I will post a picture of the hose soon too. I hope this will help and save you some
