I had this same problem 2 years ago. They did a software update I’ve been having issues like once a month where it goes to like a limp mode. I have 160hours or so. I’ve changed both air filters, both fuel filters. Coolant looks good. Does not go past 3 bars and never over heats. The tractor it self is 5 years old. Online shows soot level too high. I havnt seen the regen come on in over 60hours… any ideas?