So, on the way home today the Mini started running like crap, surging, reving and at stop lights acting like I am hitting the gas. Get home safely open the bonnet to investigate and notice a boot has slipped off my Forge intercooler on the drivers side. So I figure ok there is the prob and I fix it up, start the car and she seems to be fine but now CEL is on and when I check codes I get P1109- Manifold air pressure too high in deceleration
P1242- Secondary upstream manifold air pressure too high in deceleration.
I cleared the codes but the CEL is still on and its still throwing the same codes. should I just buy a new MAP and swap it out and cross fingers. It was running fine before the boot slipped off the intercooler. Thoughts ???

 

I doubt the boot slip damaged any sensors. I think you should continue looking for other boots that may have slipped off or are leaking.

 

Update...cleared codes yesterday and they have not come back on didnt have to replace anything it was just that dang boot slipping off and causing all the probs.