Good evening, a couple of months ago we had an inlet NOx sensor fault code and dozer went into limp mode. We had a mechanic come by and replace and did the relearn. No problems until today, we got a code for the outlet NOx sensor communication fault ECU 3226.09. We went to the local John Deere store and got a new one and dozer ran good for 5 hours. After blowing out the dozer we started it back up and it started doing the same thing. S/N 1T0700LXKNF421257 any help would be greatly appreciate. We didn’t do a relearn this time since we were in a remote location and couldn’t get a mechanic out there.
If your machine has less than 3000 hrs on it, it is still under emissions warranty. Let the dealer take care of it.