I'm having the same problem. New 15% pulley. Low mileage supercharger. Threw the same code. I replaced the bpv and the map sensor. Same code came back. Only thing I can think is a vaccume leak from the install. Or the hi mileage mini does not like the new charger. I am at a loss what to do. The car runs great. But the idle is strange. It will run up to 1200 then taper down to 800 and stay steady and other times fluctuate. Any ideas? I know the thread is old but it will help others in their searches in the future.