What does the EPC fault indicator on the car dashboard mean?

[McAlex]

The EPC indicator light has two activation states: illumination during power-on self-test and illumination 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 indicator light remains illuminated under other circumstances or does not turn off for a long time after the vehicle is started, 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 introduction to 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 throttle valves. Additionally, dirt accumulation can affect intake, causing the indicator light to illuminate. Fuel system fault: This includes issues such as substandard fuel, fuel deterioration, or poor fuel atomization. Engine fault: Insufficient engine pressure or problems with the intake valves 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: This includes situations where the brake lights do not illuminate, the brake switch malfunctions, or there are issues with the brake wiring. Solutions for when the EPC indicator light illuminates: Troubleshoot the intake system, use fuel with the appropriate octane rating, clean the throttle valve, etc. Remove carbon deposits from relevant components. Re-flash the ECU with relevant data. If the EPC indicator 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 illuminate again, there may be no issue, possibly due to temporary interference affecting the EPC indicator. If the EPC light remains illuminated or frequently lights up, the vehicle should be taken to the nearest repair facility for professional diagnosis and troubleshooting to eliminate potential safety hazards promptly. The full English name of EPC is Electronic-Power-Control, which translates directly 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 power system. When sensor data in the system is abnormal, the EPC system will take predefined actions on the power system. Common EPC indicator lights typically display in two colors: yellow and red. If the EPC fault light is yellow and the vehicle can still operate normally, proceed slowly to a repair point for inspection. If the EPC fault light is red, the situation is more severe, and the vehicle should be pulled over immediately to contact relevant repair personnel. Continuing to drive under such conditions may directly affect the vehicle's core components or driving safety.