I checked diagnostics and found poor DEF quality message. I did manual regen and it fixed by itself.
Let me put some DEF. At once every thing seems ok. Got speed again and after 10 mins reduced again to 85 but no code on dash. Can this issue link...
I got error code on dash EEC(4) and truck speed reduced to 85km/h from 105kmh. All gages appear to be ok. DEF light is blinking but DEF is full,...