Def problem /limp mode

[Topzide]

@Cummins12V98 , You're probably spot on for the 67,500 service since I did mine @ 132k and change. I can say that at that time on mine, The CCV was pretty dark colored(wish I snapped photo), the cooler and EGR were pretty nasty with carbon build up! After doing the work, I put note in my records to only clean every other cycle and replace filter @ 67,500 interval. It gave me the insight into how well the engine is working and peace in knowing how to do the maintenance!