Air bag warning light has been on since I bought this vehicle. I took it to the dealership. They cleared it and it came back on. Told me it was the drivers seatbelt switch. I bought one and installed it myself. Went back to the dealership this morning to have it cleared again. Car ran great all the way there. I have some various mods with a K04 turbo and what I believe to be is a stage 2 chip. I have a gauge installed and was running around 26 PSI. Left the dealership and now I am at 8 PSI. Did the dealership delete my software upgrade when they cleared the airbag light? Sorry if that's a stupid question but other than that I am baffled. Could that have happened? Why all of a sudden have I gone from 26 PSI to 8 ?