Electronic Power Control Warning Lamp
WARNING: This page is about a different car, the 2008 Volkswagen GTI, 2007 Volkswagen GTI, and 2006 Volkswagen GTI. However, it is still accessible from the selected car via links, so may be relevant.
The ECM monitors all EPC components after the ignition is switched on.
If a malfunction is recognized in the EPC system during the operation of the engine, the ECM switches on the EPC which is located in the instrument cluster and an entry is stored in the DTC memory of the ECM.