What is the yellow light of Toyota Lei Ling engine?

There are two situations when the engine yellow light on the dashboard of Pacific Auto Network lights up. The first is that when the car power is turned on, the car will conduct a self-test. At this time, not only the yellow light of the engine will light up, but also other fault lights will light up together and then go out together. This is a normal phenomenon. The second is that the yellow light of engine failure is still on after the car is started, which is an abnormal phenomenon that ECU reminds the owner of engine failure.

The yellow engine light on the dashboard of the car needs to be explained. There are two situations when the engine on the dashboard lights up. The first one is that when we turn on the power of the car, the car will conduct a self-test. At this time, not only the yellow light of the engine will light up, but also other fault lights will light up together and then go out together, which is normal; The second is that after the car starts, the yellow light of engine fault is still on, which is an abnormal phenomenon that ECU reminds you of engine fault.

The engine fault signal of automobile dashboard is sent by ECU (engine computer), which controls all electronic devices of the whole engine, such as electronic throttle, fuel injector, generator and fuel pump. , covering intake, exhaust, fuel, ignition and timing systems. So, what is the specific reason for the yellow light of the engine?

1, sensor problems The sensors mentioned here include water temperature, crankshaft position, air flow, intake air temperature, oxygen sensor, etc. When these sensors are damaged, the contact is poor or the signal is interrupted, the ECU of the automobile can't get the engine data accurately, which will lead to the engine fault light coming on.

2, maintenance problems Poor engine maintenance is the most common cause of engine failure. We know that all vehicles have a certain maintenance period. If the owner fails to maintain them on schedule, coupled with bad driving habits, it will increase the burden of engine operation, and finally you can only remind you by flashing yellow lights.

3. Oil quality The oil quality mentioned here includes fuel oil and engine oil. As we know, the full fuel of a car is generally labeled, and the engine oil is also divided into semi-synthetic and fully synthetic. Manufacturers generally advise car owners which brand of fuel and which type of engine oil to use. If the owner does not add it as required, it will cause the engine to wear for a long time, so no one will be blamed if the fault light is on.

4. Engine spark plug failure, ignition coil failure, fuel pump failure, oil circuit blockage, etc. It will cause poor combustion of engine mixture. The problem of engine carbon deposition or knocking caused by poor combustion of mixed gas will eventually be monitored by the engine oxygen sensor and reported to ECU, and the fault light will naturally light up as a warning.

5. When you bump on a bumpy road, or tamper with a plug on the engine, or ECU has a short signal interruption, etc. These may cause the engine to turn light yellow. As long as you go to the 4S shop, use the fault detector to clear the fault code.