What does it mean when the car EPC light is on?

[VanJames]

The EPC indicator light can illuminate in two states: during power-on self-test and under other circumstances. The power-on self-test is an indication that the vehicle is monitoring the status of all sensors before driving. Generally, if the vehicle is not started after power-on, the light will turn off by itself after about 3 seconds. If the EPC light stays on under other circumstances or does not turn off for a long time after the vehicle is started, the main reasons for the EPC light staying on include faults in the engine intake system, throttle valve, fuel system, engine, ECU control unit, or brake lights. Below is a detailed introduction to the reasons for the EPC light illuminating under other circumstances: Engine intake system fault: The EPC light will illuminate if the engine intake is obstructed or insufficient. Throttle valve fault: Carbon buildup is a common issue with the throttle valve. Additionally, dirt on the main body can also affect intake, causing the indicator light to illuminate. Fuel system fault: Examples include substandard fuel, deteriorated fuel, or poor fuel atomization. Engine fault: Insufficient engine pressure or issues with the intake valve and other power system components can also trigger the EPC light. ECU control unit fault: Examples include interference with the vehicle computer signals or false alarms from the vehicle computer. Brake light fault: Situations such as brake lights not working, brake switch failure, or brake circuit issues. Solutions for when the car EPC light is on: Troubleshoot intake system issues, use fuel with the appropriate octane rating, clean the throttle valve, etc. Remove carbon deposits from related parts. Re-flash ECU-related data. If the EPC light is on, the owner can first try turning off the engine and restarting it to see if the EPC light remains on. If it does not illuminate again, there may be no issue, and the EPC light might have been affected temporarily. If the EPC light stays on or frequently illuminates, drive to the nearest vehicle repair point for professional assistance in troubleshooting to eliminate potential safety hazards promptly. 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 mainly includes controllers and sensors related to the power system. When sensor data in the system is abnormal, the EPC system will take predefined measures for the power system. Common EPC indicator lights are generally displayed in two colors: yellow and red. If the EPC fault light is yellow and the car can still drive normally, proceed slowly to a repair point for vehicle inspection. If the EPC fault light is red, it indicates a more serious situation, and the driver should pull over immediately and contact relevant repair personnel for maintenance. Forcing the car to drive under these conditions can directly affect the vehicle's core components or driving safety.