I have a ( dont laugh ) Isuzu 5.2 with a blinking DEF light full tank of DEF and DEF gauge reads full. EXH SYSTEM in red on the message board and the derate icon is on but it dosent seem to be derated when I drive it. Cant do a forced regen. Also have a P02C9 code. I also get a P1034 NOX code.
Blinking DEF
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Mr Bob, Aug 4, 2020.