2018 Komatsu WA270 Front end loader A28239 We are getting an L04 code. I have changed the DEF fluid and disconnected the battery. The same code returned and the machine is now d rating. Any ideas of what direction to go in will be greatly appreciated.
That def system may still be in warranty. I would contact your local dealer and give them the serial number of your machine. They will tell you if it is. Usually a lo4 derate will require a dealer hook up anyway
What does the code say? (Description)