The EPC warning light, also known as the Electronic Power Control warning light, is a vehicle warning indicator that indicates a problem with your Volkswagen's throttle system, such as with the throttle pedal, throttle body, traction control, or cruise control.

While you can continue to drive with the EPC warning light on, you run the risk of doing significant damage to the engine. To help prevent damage, the EPC’s limp-home mode might activate, making the vehicle sluggish as you seek help. Even if the car seems to be operating normally, don't continue to drive any longer than is necessary with the EPC light illuminated. The vehicle should be checked by a competent technician as soon as is possible.

An OBDII scanner is the best way to discover the source of the EPC light problem. Virtually all service shops have such scanners, and they are becoming more available and affordable for do-it-yourself use at home. The scanner will reveal a trouble code, and technicians can make appropriate repairs. Once the repair is made, the technician will erase the trouble code and the warning light on the dashboard will disappear.