I'm getting a P115C code. Ive put in new MAF sensor, new valve cover and new boot from MAF sensor to turbo intake. and still getting code. But no other codes. Could this engine pressure sencor have anything to do with it? . Its a 08 n56 turbo engine

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if the intake system is free of obstructions and no leaks, the timing on engine may be off.

- Nick

Valve cover would've been my first note, but since you replaced it you should definitely check your timing. I'd suggest checking your throttle body. If your timing is fine, check the TB. Also, double and triple check your intercooler piping. Let us know what you find out.