I finally had one of these 6.0s come in today with the truck has no power complaint otherwise everything was ok. Only codes were P0401 EGR insufficient flow and P0299 Turbo Under boost. Many times the simple things are overlooked and in this video I show you just how simple the problem can be and how cheap it can be to fix. Keep this in mind when diagnosing these codes. Hope this helps save some money from needless repairs.