Audi Workshop Service and Repair Manuals

"EPC" is the abbreviation for Electronic Power Control.

→ Location of EPC warning lamp

If faults are detected in the electronic power control system when the engine is running, the engine control unit will switch on the EPC lamp. (These faults are identified in the fault table.) Simultaneously an entry is made in the engine control unit fault memory.

Functional check:

• ‒ Switch on ignition:
      the EPC warning lamp must light-up.

If the EPC warning lamp does not light-up with ignition switched on:

If the EPC warning lamp lights up with ignition switched on:

• ‒ Start engine and run at idling speed:
      The EPC warning lamp must go out after
      a few seconds.

If the EPC warning lamp does not go out:

• ‒ Interrogate fault memory, if necessary, repair any faults and then erase fault memory , interrogating and erasing fault memory.