Can the car engine fault light be turned on?

When the engine fault light is on, it may be the fault of the fuel rail pressure sensor or the throttle position sensor. It is recommended to go to a 4S shop or a professional maintenance point for inspection, and connect professional automobile testing equipment to check the fault code. If the feedback from the testing equipment shows that there is something wrong with the throttle, it is suggested to clean the throttle first, and then see if the fault light disappears.

If the engine fault light is still on after driving for a period of time, it is that the fuel rail pressure sensor has failed and needs to be repaired and replaced in time.

Not all engine trouble lights won't turn on. If the engine fault light is on, there is no abnormal sound in the engine room, there are no other abnormal prompts in the instrument, the vehicle power is not affected, and the gearbox upshift is not affected, you can continue to drive to the 4S shop for further investigation, because the intake and exhaust may cause the engine fault light to be on. Specific analysis of specific problems.

This kind of engine fault light, usually called yellow, is also called EFI system fault light. As long as the engine power and sound are not particularly abnormal, you can continue driving. Because there is a program to replace the error in ECU.

Once one of many sensors fails, in order to ensure the normal operation of the engine, ECU will replace the parameters of the failed sensor according to the preset backup parameters to avoid the vehicle breaking down. For example, if the water temperature sensor is broken, the ECU takes the backup value of 80 degrees as the control parameter of fuel injection and ignition. So it can be opened, but it should be repaired in time. If it is not solved in time, the following situations may occur:

1, the quality of automobile exhaust becomes worse, polluting the environment;

2. Automobile fuel consumption increases;

3. The combustion chamber temperature rises, and the wear intensifies, which leads to the acceleration of engine wear;

4, the engine noise increases, affecting driving and riding comfort.

There are two situations when the engine fault light is on:

The yellow symbol light (1) indicates that the engine is faulty, but the fault does not affect the normal operation of the engine, but it must be repaired;

(2) The red symbol light indicates that the engine has a serious fault and needs to be repaired immediately under normal circumstances. If it is under special road conditions, it can be exercised in an emergency, but it is necessary to pay attention to the working state of the engine at all times; But remind me that EFI engines have self-protection control systems, which will not let you ignore the life and death of the engine;

Extended data:

Engine indicator lamp refers to the indicator lamp used to display the working state of the vehicle engine.

This indicator lamp is used to display the working state of the vehicle engine. When the key door is opened, the indicator light will automatically light up and go out when the vehicle is self-tested. If it is on all the time, it means that the engine of the vehicle has mechanical failure and needs maintenance.

References:

(Baidu Encyclopedia: Engine Indicator)