Bunasera, I have a 2010 bmw x6 4.0d 306hp n57d30b, previously replaced the engine 2 times. After replacing the engine the vehicle presented the defect code p4530 under partial throttle conditions, the actual pressure remains lower than the target pressure for about 3/4 seconds and then the error comes on.When the error appears the actual pressure reaches the target value and the car regains power.I have replaced the electronic variable geometry turbine 3 times, changed all the vacuum tubes, and the valve that controls the waste gate of the main turbine without solving it, do you have any suggestions?

Thank you and have a good evening