So I changed out the rear pads and rotors today (2002 1.8T). After reassembly the brakes work great but got the brake fault. When I was pressing the caliper back in I opened the bleeder screw. My rationale was that I would introduce some newer brake fluid into the lines rather than shove the same fluid back toward the reservoir. It also was topped off so I didnt want to overflow the reservoir. I guess in hindsight this may have been a bad idea since the fault is on now. I bled the brakes the best I could with my 8 year old son on the pedal. Like I said they feel good and work good, but are in a fault. Do I just need to rebleed them better? Could I have gotten air in the master cylinder? It is just the Brake light flashing, not the ABS light. How would one go about bleeding the master cylinder or just checking to see if there is air in it? What would even cause the STOP brake fault anyway? I know for a fact the reservoir is not low on fluid so that is ruled out.