Fault code 2754 - 2011 KW T660

[Houser]

Hey, I'm currently having the same problem with about 10+ of my trucks. All ISX 15 cummins. We have replaced DPFs, pressure sensors and lines. Cleaned intake sensors and EGR pressure sesnors. Nothing seems to be working. We have sent trucks to our local Kenworth and they have soent time trying to figure them out and can not seem to fix it. We are spending $2000-3000 at a time and need to figure out why this code won't go away.