My R56 just have check engine light on limp mode, CEL still remain. feeling lack of boost and I don't hear any sound of BOV or turbo. I replaced diverter valve but it doesn't help.
I pull Mini Scanner and giving me code 2885 "Boost Deviation Error" it can be bad turbo or bad wastegate? any suggestion?

thank

 

Check the vacuum lines under the intake manifold. Also make sure the lines werent criss crossed.

 

I replaced Turbo vacuum line and Boost Solenoid Valve but light still on.