2000 Audi A4 1.8TQM

i have a CEL, brought it to my brothers shop and the codes i got are as follows:
P0102 MAF/VAF Circuit Low Input
P1137 Mfr Ctrlled Fuel And Air Metering

i replaced the MAF one time before, cleared the code and then as soon as the car moved an inch, the CEL came back on.

where do i go from here? anyone have this happen to them?

 

CHeck the wires coming from the MAF to see if they are frayed or anything.

Josh

 

P1137 = fuel pressure ,leaking injector(s), EVAP canister purge valve

P0102 = MAF low input short to ground