What does the car fault code EPC mean?

[Theodore]

The EPC indicator light can illuminate in two states: during the power-on self-test and 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. If the EPC indicator light remains on after the vehicle is started or illuminates under other conditions, the possible causes 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 and trigger the indicator light. Fuel system fault: Examples include substandard fuel, deteriorated fuel, or poor fuel atomization. Engine fault: Insufficient engine pressure or issues with components like the intake valve in the powertrain can also cause the EPC light to activate. ECU control unit fault: This includes interference with the vehicle computer signals or false alarms from the vehicle computer. Brake light fault: Situations such as brake light failure, faulty brake switch, or brake circuit issues. 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 light comes on, the owner can first try turning off the engine and restarting it to see if the EPC light remains illuminated. If it does not, there may be no issue, and the light could have been affected temporarily. 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 pre-programmed measures for the powertrain. Common EPC indicator lights are usually displayed in two colors: yellow and red. If the EPC fault light is yellow and the vehicle can still operate normally, drive slowly to a repair point for inspection. If the EPC fault light is red, the situation is more severe. The driver should pull over immediately and contact a repair technician. Continuing to drive could directly affect the vehicle's core components or safety.