Hi, what information system are you using for fault code descriptions/repair routines and wiring diagrams?

What system testing have you done with reference to the codes logged?
I.e. if the boost pressure is holding high and the fault codes reflect this then you need to find out how the boost pressure control circuit works on that vehicle

We can help you but you must give us more info and show that you are at least trying to work through the fault yourself. HTH

Regards Mark