EPC light

Guys just bought a 03 audi 1.8t wagon
And i test drove the car everything was cool but after i got home and turn off the car for a while when i came back and try to start it didnt want to, after a couple time it did but this EPC light stayed on and the idle was around 1100/1200 rpm, but after a turn off again and turn on it went away! Any ideas?:slight_smile: thanks