What does it mean when the car's EPC light turns yellow?

[VanAlexa]

The EPC indicator light has two activation states: power-on self-test illumination 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 engine is not started after power-on, the light will turn off by itself after about 3 seconds. In other cases, if the EPC light stays on after the vehicle starts or does not turn off for a long time, the main causes may include engine intake system failure, throttle failure, fuel system failure, engine failure, ECU control unit failure, or brake light failure. The following is a detailed introduction to the reasons for the EPC light turning on under other circumstances: Engine intake system failure: The EPC light will activate if the engine intake is obstructed or insufficient. Throttle failure: Carbon buildup is a common issue with the throttle. Additionally, dirt accumulation can affect intake, triggering the indicator light. Fuel system failure: This includes situations such as substandard fuel, deteriorated fuel, or poor fuel atomization. Engine failure: Insufficient engine pressure or issues with the intake valve and other powertrain components can also cause the EPC light to activate. ECU control unit failure: For example, interference with the vehicle computer's signals or false alarms from the vehicle computer. Brake light failure: This includes situations where the brake light does not illuminate, brake switch failure, or brake circuit failure. Solutions for when the car's EPC light turns on: Troubleshoot the intake system, use fuel with the appropriate octane rating, clean the throttle, etc. Remove carbon deposits from relevant parts. Re-flash ECU-related data. If the EPC light turns 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, there may be no issue, and the EPC light might have been affected temporarily. If the EPC light stays on or frequently activates, 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 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 powertrain. When sensor data in the system is abnormal, the EPC system will take predefined measures to address powertrain issues. Common EPC indicator lights usually display two colors: yellow and red. If the EPC fault light is yellow and the vehicle can still operate normally, drive slowly to a repair facility for inspection. If the EPC fault light is red, the situation is more severe, and the vehicle should be pulled over immediately, with professional repair personnel contacted for assistance. Continuing to drive under such conditions may directly affect the vehicle's core components or driving safety.