Here's my problem. About one month ago check engine light came on and it was a P0101 code. Dealer put on a new MAF. Two days later same code. It also would randomly go in and out of reduced engine power. Went back to the dealer and the said they tried a MAP and also they did a service regen. CEL came on on way home, went into reduced power again. Took it back a third time with the CEL on and they drove it for 100 miles and said they could not duplicate the problem. Ever since i got it back it seems sluggish off the line. I have my own auto repair shop so i decided to do some digging, found a lot of oil on the map sensor. So i decided to look at the intercooler lines and they are all full of oil. My question is can the pcv system have let that much oil into the turbo, and if so could this be causing my running problems?????

I was planning a pcv reroute anyway but now i am definitely gonna do one

the truck is an 07.5 lmm cc/sb

PCV oil in in the induction system is normal and does not cause a problem.

2007 LLM's have a service calibration available to fix a problem with the P0101 code. Have you had this service performed?
P0101 can be set for a variety of reasons and almost never caused by the MAF sensor. Aftermarket intake systems cause this code. Aftermarket exhaust systems or modifications to the exhaust system cause this code. Any induction leak downstream of the MAF will cause this code.

Hmmm interested to see what people say on this one