Sorry for the long Noob post, but I figure someone might have seen this problem before.

I have a 2002 A4 1.8T Quattro with an APR Stage 1.

Check engine light came on, coupled with 4 loud beeps from the rear speakers (or trunk?) when I start the car in the morning. The beeps are inconsistent, and don't always happen.

Took the car to the dealer, said that they found an error in the ECM. Being a dumb*ss, I didn't get the VAG code, but will this coming week.

Can anyone give any advice or input without the codes? Have you heard of an ECU causing this problem?

chances are its a fault from upgrades which just needs to be reset but without the codes its just a very rough guess, for now just check all pipes for leaks in the inlet side and check all engine electrical connections are tight and clean