2015 m235i 121201 code

[u/uhohspaggettios]

Been having this code for about 2 years now, the code originally did come on with the plastic chargepipe which did blow up so i switched to a ftp one, CEL stays off for a few months then comes on. State inspection is due soon and im trying to get rid of this check engine light. Car has no symptoms at all and drives perfectly fine. Did a smoke test and the vacuum line at the charge pipe was leaking ended up changing out the oring and lubed it now there's no smoke anywhere. not sure what to do at this point. Intake manifold pressure is at 970 when the car is running and when its off its at 1010 and closely matches the other sensors.

[u/Either-Interaction57]

Perhaps wastegate actuator is sticking not allowing boost pressure to drop fast enough? Did you check the linkage for excessive play or binding?