Posted 8/12/2026 07:15 (#11725581 - in reply to #11725222) Subject: RE: DEF issue
Central IL
Since its in derate you are stuck calling dealer to reset. He will be able to see the trouble codes and tell if there is more going on. The fact that you ran it with the batteries so low likely causing some systems to malfunction is likely your issue. Just another one of those life lessons.
DEF issue
