What does the EPC light on the car display mean?

[DiJaxson]

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 checking 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. In other cases, if the EPC light remains illuminated 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 light. 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: This includes issues such as substandard fuel, fuel deterioration, or poor fuel atomization. Engine fault: Insufficient engine pressure or problems with components like the intake valve in the powertrain can also cause the EPC light to activate. 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 light fails to illuminate, the brake switch malfunctions, or the brake wiring is faulty. Solutions for when the EPC 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 updated data. If the EPC light illuminates, the owner can first try turning off the engine and restarting it to check if the light remains on. If it does not, there may be no issue, as the EPC light could have been affected temporarily. If the EPC light stays on or frequently illuminates, the vehicle should be taken to the nearest repair facility for professional diagnosis and timely resolution of 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 measures to address the powertrain issues. Common EPC indicator lights are typically displayed in two colors: yellow and red. A yellow EPC fault light indicates that the vehicle can still be driven, but it should proceed slowly to a repair facility for inspection. A red EPC fault light signifies a more severe issue, and the vehicle should be pulled over immediately while contacting a professional for repairs. Continuing to drive under such conditions may directly affect the vehicle's core components or compromise driving safety.