What does engine electronic control system failure mean?

[LaAriel]

Engine electronic control system failure refers to a malfunction in the engine's oxygen sensor. The oxygen sensor is responsible for detecting when the air-fuel ratio of the mixture in the engine deviates from the theoretical air-fuel ratio, as the purification capacity for substances like carbon monoxide in the mixture will sharply decline. Installing an oxygen sensor in the exhaust pipe allows it to detect the oxygen concentration in the vehicle's exhaust and send signals to the ECU. The ECU then controls the fuel injection quantity of the injector to keep the air-fuel ratio of the mixture near the theoretical value. The automotive electronic control system mainly consists of sensors, control units, and actuators, with the control unit being the core component. The electronic control unit (ECU) is the heart of the engine's electronic control system, capable of collecting various engine parameters and controlling fuel injection quantity and timing, determining the functionality of the entire electronic control system.