boost issue

[davidgtrr34]

I keep getting a fault code saying
charge pressure maximum limit exceeded
I was only running 15psi and then a get this code and after I only can run 10psi.
Does anyone no what is causing this code. Would it have anything to do with the maf because im using an maf from a 225bhp audi tt.

[Wazzzer]

Something must be telling the ECU that the boost is too much which is shutting it down; the MAF my have a part in this