My SID display is missing bitsYou can attempt a fix, but success is varied. Buy a new one.
No boost on Diesel 2.2 variable Vane and 3.0.Take it for a run and use full throttle. If that doesn't solve the problem, take the shield off the turbo and move wastegate manually with engine running. This will let the carbon deposits causing waste gate to stick flush down the exhaust. If not Turbo needs removing and cleaning.
EGR ValveCarbon deposits cause blockage. Clean valve first else replace if faulty