sounds like Dealership has no idea and is just throwing parts at the truck

Catalytic converter is a pass through type on these trucks. absolutely no way it can affect the motor. it has a big 3" hole straight through it.


I think you need to find a better competant technician...and take that Dealership to task for just wasting your money. Turbo doesn't just "go bad" because of carbon build-up.



What codes is the PCM throwing?