What is the reason for the failure light of Mercedes-Benz engine?

Causes of failure light of Mercedes-Benz engine;

1. There are many cases where the abnormal engine oxygen sensor causes the engine fault light to alarm. The engine oxygen sensor is usually placed near the intake manifold. Due to violent driving or some collision situations, the oxygen sensor will be displaced or damaged, which will cause the sensor to be abnormal and trigger the fault light alarm.

2. Nozzle blockage and carbon deposition in the intake valve will also trigger the engine fault light alarm. Because there are impurities in gasoline, these impurities will gather at the nozzle, which will affect the fuel injection of the nozzle, especially for the direct injection engine in the cylinder, which will directly lead to the engine flameout and so on. However, carbon deposit will be produced after impurity combustion, which will affect the normal opening and closing of the throttle and the normal operation of the engine, leading to the lighting of the alarm lamp;

3. Another common situation is sensor failure. After a muddy walk, the engine trouble light suddenly turned on, but there was nothing unusual about the car itself. When I drove the car to the 4S shop for inspection, I found that the left front wheel sensor was faulty. As a result, the problem was solved after cleaning with water and then installing. Abnormal sensor does not mean that the vehicle must have a fault, but there must be something abnormal to pay attention to.