What causes the EPC light to come on in a car?
1 Answers
Car EPC light comes on due to fuel quality issues or electronic control system failure. The following are detailed explanations of the above reasons: Fuel quality issues: A constantly illuminated EPC warning light indicates a fault in the engine management system or electronic control, often accompanied by unstable idle speed or engine cold start vibration. However, for domestic drivers in China, this is usually caused by poor fuel quality and dirty driving environments. It is recommended to drive to a maintenance service station as soon as possible for inspection. In most cases, cleaning the throttle body can resolve the issue. Electronic control system failure: The EPC indicator light will illuminate when the ignition is turned on for functional check. If this light comes on while driving, it indicates a fault in the engine power electronic control system. The engine must be checked immediately. Generally, a dirty throttle body, vacuum leaks in the intake system, damaged brake switches, or untimely engine upgrades can all cause EPC faults.