my epc light came on what is it? on 2005 Audi A4 Quattro

yea the other day i went out to start my car and it gave me a little trouble but it started and that light came on.so i went down the road and shut it off for like 20 mins or so and started it back up and the light went off...but today i was letting it idle and it jus shut off and that light that light came on again and stayed on what is it?

1 answer
Many different things could cause the EPC light to be on. You need to get a computer diagnostic. I'd suggest to take it to a VW/Audi specialty shop, who has VAG-COM or similar diagnostic capability.

Zee