2004 X5 E53 3L D- turbo or injektor problems?

[Clavurion]

Smooth running control relates to injector correctional values. That code is present if some injector correctional value goes beyond accepted limits. So first check the values with proper diagnostics.

[norway2]

I have checked a little more and the engine has little power and I think there is something wrong with the charge pressure regulator or vacuum hose, on the error message it says 4530 charge air pressure control - present, anyone know what that means?
Tried to blow in the 2 hoses that go out from the vacuum reservoir when the car is turned off and on one side it is tight but on the other side (marked yellow in the picture) it is not tight but maybe it should be like that?
From the split, a vacuum hose goes under the intake manifold but I can not see where it leads and I would rather not disassemble the manifold, anyone know where it leads?