The EPC light indicates an issue with a computerized system in your vehicle. It is exclusive to VW, Audi, Bentley, and other V.A.G cars. Computers are taking over everything on your vehicle. Traditionally, components like the steering, the parking brake, and the gas pedal used to require mechanical linkages. Nowadays, computers and electric motors can take care of all of these functions and more. Electronic Power Control (EPC) is a computerized ignition and engine management system found in V.A.G. cars — more popularly known as the Volkswagen Group.