Hi now i got 17549 and earlier 17549 and 17539 codes together on my VAGCOM, does anyone know what I should check up on in order to fix the problem. Ive already got new i think, MAF sensor from dealer, its been almost a year ago, for 2 months already service light camoeson from time to time. Can it be MAF sensor again? Can MAF sensor ive bought form dealer, been refurbish not brand new? In code explonation they wrote something about pressure sensor as well. I'm confused. Thank you for all replies.