What does it mean when the ECU light is on in a Baojun 730 AGS?

[McXavier]

If the warning light has not come on, there is no problem. When the car is running, if certain sensor parameters exceed standard values, the ECU will recognize it as a fault, and the corresponding fault code will be stored. If it is a qualitative fault, the decoder cannot erase it. Introduction to the Car ECU: ECU (Electronic Control Unit), also known as the "vehicle computer" or "on-board computer," is essentially a specialized microcomputer controller for automobiles. Just as humans have a brain, computers have a CPU, and cars have an ECU. Scope of the ECU: Initially, the ECU was used to control engine ignition and fuel injection, so in a narrow sense, it is the engine control unit. As automotive electronic systems evolved, more functions were added, such as controlling the chassis (ESP, ABS, ASR) and controlling the transmission (TCU for automatic transmissions). Therefore, these control units are now collectively referred to as electronic control units, or ECUs in a broader sense.