What does EPC displayed on the vehicle mean?

[SanGraham]

The EPC indicator light has two activation states: self-check illumination during power-on and illumination under other circumstances. The power-on self-check is an indication that the vehicle is monitoring the status of all sensors before driving. Generally, if the engine is not started after power-on, the light will turn off by itself after about 3 seconds. In other cases, if the EPC indicator light remains illuminated after the vehicle starts or does not turn off for an extended period, the main causes may include faults in the engine intake system, throttle valve, fuel system, engine, ECU control unit, or brake lights. Below is a detailed explanation of the reasons for the EPC light illuminating under other circumstances: Engine intake system fault: The EPC light will activate if the engine intake is obstructed or insufficient. Throttle valve fault: Carbon buildup is a common issue with the throttle valve. Additionally, dirt accumulation can affect intake, triggering the indicator light. Fuel system fault: Examples include substandard fuel, fuel deterioration, or poor fuel atomization. Engine fault: Insufficient engine pressure or issues with components like the intake valves in the powertrain can also cause the EPC light to activate. ECU control unit fault: This may involve signal interference in the vehicle's computer or false alarms. Brake light fault: Situations such as brake lights not working, faulty brake switches, or brake circuit issues. Solutions for when the EPC indicator light illuminates: Troubleshoot intake system issues, use fuel with the appropriate octane rating, clean the throttle valve, etc. Remove carbon deposits from relevant components. Re-flash ECU-related data. If the EPC light illuminates, the owner can first try turning off the engine and restarting it to check if the EPC light remains on. If it does not, there may be no issue, possibly just interference affecting the indicator. If the EPC light stays on or frequently illuminates, the vehicle should be taken to the nearest service point for professional diagnosis and repair to eliminate potential safety hazards. The full English name of EPC is Electronic-Power-Control, which translates to electronic power control. Most people refer to it as the engine electronic stability system. The EPC system primarily includes controllers and sensors related to the powertrain. When sensor data in the system is abnormal, the EPC system will take predefined actions to address powertrain issues. Common EPC indicator lights are usually displayed in two colors: yellow and red. A yellow EPC fault light indicates the vehicle can still be driven, but it should proceed slowly to a repair point for inspection. A red EPC fault light signifies a more serious issue, and the vehicle should be pulled over immediately, with professional repair services contacted. Continuing to drive under such conditions may directly affect core components or driving safety.