What is the reason for the fault light of Cruze engine?

The reason why the Cruze engine fault light is on is as follows: 1. Engine fault light is not necessarily a fault: it may be that some parameters exceed the standard value, such as excessive exhaust emission, or the engine occasionally catches fire for some reason. These conditions will not affect the normal running of the vehicle, but the fault code will be stored in the engine computer. 2. The engine system is not working normally: if the accelerator pedal sensor, accelerator position sensor and air flow meter crankshaft position sensor are faulty or the line contact is poor, the engine fault light will light up. Generally, this kind of faulty light will also lead to poor acceleration. Sometimes the vehicle can be used normally after the key is turned off and restarted, but the fault light is still on.