The scanner will reveal a trouble code, and technicians can make appropriate repairs. Virtually all service shops have such scanners, and they are becoming more available and affordable for do-it-yourself use at home. The vehicle should be checked by a competent technician as soon as is possible.Īn OBDII scanner is the best way to discover the source of the EPC light problem. Even if the car seems to be operating normally, don't continue to drive any longer than is necessary with the EPC light illuminated. To help prevent damage, the EPC’s limp-home mode might activate, making the vehicle sluggish as you seek help. While you can continue to drive with the EPC warning light on, you run the risk of doing significant damage to the engine. Therefore, if the light comes on, immediately seek a safe place to have your vehicle serviced by a competent technician. Often the engine will continue to operate, enabling you to reach a technician for diagnosis and repairs.Īn EPC warning light could be an indicator of a minor problem or of very serious problems. This will severely curtail power and give you the impression that the car is on the verge of stalling.

To try to protect the engine from damage, the EPC might activate a 'limp-home' mode. The cruise control could turn itself off, and the electronic stability control might cease functioning as well. The EPC works in concert with the ECU to monitor functions, and if something goes wrong, the EPC flashes a warning light on the dash.Īt the same time, depending upon the malfunction, other warning lights like the 'check engine' light might also illuminate. In normal operation, your vehicle's Electronic Control Unit (ECU) is the 'brain' of the car, enabling the engine, drivetrain, and other systems to operate properly. Originally designed to manage ignition and throttle functions, EPC's role now includes oversight of a number of electronic systems like electronic stability control and cruise control. Vehicles from all of these brands are likely to have EPC. market, Volkswagen Group's most popular brands are Audi, Porsche, and Volkswagen.

EPC stands for Electronic Power Control, a computerized ignition and engine management system used in many recent Volkswagen Group vehicles.

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