What's the matter with the car still running when the engine fault light is on?

When the engine fault light is on, it can only show that there is abnormal data in the engine electronic control system. The computer converts these abnormal data into fault codes, so as to light the fault lights on the instrument and prompt the driver to repair the vehicle in time. However, the engine electronic control unit has a standby system, which will be temporarily standby when the actuator or sensor in the electronic control system fails. The engine can also be used at this time, just for its running performance. Weakening, this time is called women's state, at this time you can drive the vehicle to the repair shop for maintenance.