I would start with clearing the codes and see what if any come back.
Alright i have a 05 1.8t GLI I just installed a 42 draft designs full 3inch turboback, and a eurojet turbo inlet hose, after I put the stuff on my check engine light came on which I thought was gonna happen and is normal but my traction control light came on as well, the cars running better then ever and pulling harder then ever, but when i hooked it up to the computer I'm throwing 18 codes? Ive triple check to make sure everythings tight and in the right spot? anyone else have this issue? or know what could be wrong? thanks
yeah i moved the MAF a little bit but I put it back exactly where it was and the airflow's going the right direction I just took it out and cleaned it today, Its idling good and in my opinion running better then ever but still throwing codes, i guess i should just get a new MAF and O2 sensors and see if anything changes