What does the Electronic Power Control (EPC) warning light mean?
The EPC light indicates a problem with your vehicle's computerized system. This is exclusive to VW, Audi, Bentley and other VAG vehicles.
Computers take over everything in your car. Traditionally, components such as the steering, parking brake, and gas pedal required mechanical connections. Nowadays, computers and electric motors can perform all these functions and more. Electronic Power Control (EPC) is a computerized ignition and engine control system used in VAG vehicles, better known as the Volkswagen Group. This includes Volkswagen (VW), Audi, Porsche and other automotive brands. To see if this applies to your vehicle, check out the responsive VW dealer website. It is used by other vehicle systems such as the stabilization system and cruise control. Any EPC malfunctions will most likely disable other functions in your vehicle. It is important to keep the system up and running. A warning indicator on the dashboard will let you know if there is a problem with the EPC system.
What does the EPC indicator mean?
Since the EPC is used in many other vehicle systems, it is likely that other warning lights will come on on the dashboard as well. Normally, stability control and cruise control will be disabled and the corresponding indicators will be on. The Check Engine light may also come on to indicate that the engine itself is not running at normal efficiency. To try to protect the engine, the computer can send the car into "idle mode" by limiting the car's throttle and power. The car may feel sluggish while you are limping home or to the mechanic.
You will need to scan the vehicle for trouble codes with an OBD2 scanner which can be used to identify the problem. The scanner will connect to the EPC and read the stored DTC, which indicates a problem in the vehicle. Once the source of the problem is fixed and the codes removed, everything should be back to normal.
Is it safe to drive with the EPC light on?
Like the check engine light, the severity of the problem can vary greatly. If this light comes on, you should have your vehicle checked as soon as possible to prevent serious damage. If your vehicle restricts the throttle to protect the engine, you should only use the vehicle for repairs.
Common problems with your vehicle's EPC are due to a faulty engine, ABS or steering wheel sensors that need to be replaced. However, the problem may be more serious, such as brake or brake pedal failure, throttle body failure, or power steering failure. Don't put off checking your car as soon as possible. If the EPC warning light is on, our certified technicians are on hand to assist you in diagnosing any problems you may have.
