What's wrong with the car showing engine trouble?

The reasons for the failure of automobile display engine are: sensor problems, maintenance problems, oil quality problems and so on.

1. Sensor problem:

Sensors 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.

2. Maintenance issues:

Improper engine maintenance is the most common cause of engine failure. All vehicles have a certain maintenance cycle. If the owner fails to maintain them on time, coupled with bad driving habits, it will increase the burden of engine operation. Finally, you can only remind your car through the fault light.

3. Oil quality problems:

Oil quality includes fuel oil and engine oil; Generally, the full fuel of a car is labeled, and the engine oil is also divided into semi-synthetic and fully synthetic. Manufacturers generally recommend which brand of fuel and engine oil car owners use. If the owner does not add it as required, it will cause engine wear in the long run.

4. Poor combustion of mixed gas;

Engine spark plug failure, ignition coil failure, fuel pump failure, oil blockage, etc. Will lead to poor combustion of engine mixture; The problem of carbon deposition or knocking caused by poor combustion of mixed gas will eventually be monitored by the oxygen sensor of the engine.

5. Air intake problem:

When the engine is burning, it needs air intake; The air filter element is very important in this process. The air filter element of the car is not clean, and irregular cleaning will affect the air intake of the car.

6. The problem of pressure:

The intake booster pipeline and turbocharger will cause the engine fault light to light up; The most common problem is that the turbocharger is damaged, and at the same time, the vehicle will have symptoms such as oil leakage, high fuel consumption, decreased power, abnormal metal noise, blue smoke or black smoke from the exhaust pipe.

7. Exhaust problem:

Rear oxygen sensor, three-way catalytic converter, exhaust camshaft and bearing bush. The most common thing is that the fault of three-way catalyst leads to the engine fault light. The use of leaded gasoline, the use of lubricating oil additives containing lead or silicon, the collision of three-way catalyst and the failure of engine oil supply system are all factors that easily lead to the failure of three-way catalyst.