The automobile engine jitter fault light is on. What happened?

The possible reason why the car shakes the engine fault light is that the engine mixture is not fully burned. When the mixture in the cylinder is too rich, the car will have symptoms such as knocking and shaking. When it is too thin, the car will not be able to accelerate. It may be that the abnormal oil supply pressure causes the engine fault light to light up, which leads to the car shaking.

Exhaust system failure

1, oxygen sensor failure. The oxygen sensor feeds back the air-fuel ratio signal to the engine. Failure may lead to inaccurate fuel injection and engine jitter.

2. The three-way catalytic converter is blocked. Three-way catalytic converter is a device for purifying waste gas. The blockage of three-way catalytic converter will not only make the engine shake, but also lead to the obvious decrease of engine power.

General vehicles will cut off the power supply of the instrument in a short time or after opening the main driving door, and normal vehicles will not prompt any warning lights. Once the warning light is on, there must be something wrong with the engine itself or peripheral components. Because there are too many possibilities of fault problems represented by the engine fault light, it is recommended that the owner go to the repair shop to read the specific content of the fault code through the computer, and accurately judge the fault point, rather than making subjective guesses.