Rawze.com: Rawze's ISX Technical Discussion and more

I wondered if someone could point me in the correct direction. I got a code several weeks ago regarding the differential pressure sensor which I replaced as well as the wiring harness however I still have the code. If you do not know I rebuilt this engine a couple months back and all was good up until a few weeks ago with this code I'm not sure what else could be the culprit any suggestions would be much appreciated

Thanks

did you clean all the carbon and soot out from the feed-lines / circuit .. and its mounting block?.

99% sure rawze just stated your issue.... But if its gone that far you might as well go ahead and clean the entire egr system. If its bad enough to stop the ports up then you have buildup in other places as well