Answer:
Since 1996, all vehicles sold in the United States must be equipped with OBD-II. The integrated diagnostic system (OBD) is a device that detects engine problems. The system was created to help control vehicle emissions.
In summary, this system can detect and inform the driver about engine failures. Send a message to the engine control module (ECM) of the engine. The ECM is responsible for controlling many engine processes, including air / fuel mixing and emissions. Thanks to the ECM system, the engine can run efficiently and reduce emissions. The ECM uses sensors to monitor the engine, adjust emissions and / or engine times, if necessary; It will inform the driver when something is wrong with the vehicle by turning on the "Check engine" light on the dashboard. If the OBD-II system detects a problem, it records and stores the code corresponding to the problem to which a technician has access. A qualified technician can connect your computer to the ECM system to receive the error code and diagnose the problem. The OBD system makes it easy for technicians to determine what happens to their engine.
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