What is the cause of Cayenne engine fault light?

The reasons are: sensor problems, maintenance problems, oil quality problems, poor combustion of mixed gas and air intake problems.

1, sensor problem

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.

2. Maintenance issues

Improper engine maintenance is the most common cause of engine failure. We know that all vehicles have a certain maintenance cycle. If the owner fails to maintain them on time and has bad driving habits, it will increase the burden of engine operation. Finally, you can only remind you to care about your car through the fault light.

3. Oil quality problems

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 long-term engine wear.

4. Poor combustion of mixed gas

Engine spark plug failure, ignition coil failure, fuel pump failure, oil circuit blockage, etc. 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. Air intake problem

When the engine is burning, it needs air intake. In this process, the air filter is very important. If the air filter of a car is not clean and is not cleaned regularly, it will affect the air intake of the car. If it is blocked for a long time, it will cause the engine fault light to light up.