I haVE AN AUDI 2001 TURBO 1.8 ePC LIGHT IS ON WHAT DO THAT MEANS

SOURCE: EPC Light.

change the EPC sensor, it will cost you only 100$

SOURCE: audi tt 180 quattro car wont start. EPC and E-M system lights on

I would suggest you check oil levels etc. Generally these cars suffer from the air mass meter / air sensor problems aswell as coil problems too. Did you ever get a solution to the problem?

SOURCE: The car shuts off, EPC light comes on, car won't start

find the trouble code find out wat code mean,s wat an replace wat is not working the code will tell u wat,s not working hope this help u

SOURCE: brake pad llight on audi 2001 a6

In the past I had the same problem with new pads!
You must check up if new brake pads electrical wires are OK. Try as follows:
1. Disconnect only new brake pads wires from the vehicle electrical circuit.
2. Extract old brake pads wires from old brake pads.
3. Insulation wear cap from old brake pads wires.
4. Connect old brake pads wires on the vehicle electrical circuit.
5. Switch ignition ON and start engine.
Now the wear light must go off !
Please Rate my Response! Thanks!

SOURCE: The epc light comes on

I am having the same problem on my Audi A4 2004 FSI, lose power whilst driving at speed with the EPC light coming on. Looks like a design fault of some kind with Audi petrol engins, have read a few forums about this but no clear straight answer. Check the link below:

http://www.audi-forums.com/b6-forum/37371-a4-fsi-epc-light-power-loss.html