What does an OBD fault in a car mean?
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OBD stands for On-Board Diagnostics, a system that continuously monitors the engine's operating conditions and the working status of the exhaust after-treatment. It will immediately issue a warning if it detects any situation that may cause excessive emissions. Below is an introduction to the OBD system: 1. Full name of OBD: On-Board Diagnostics, which translates to Chinese as a detection system extended for automotive fault diagnosis. "OBDⅡ" is the abbreviation for "On-Board DiagnosticsⅡ", meaning Type II On-Board Diagnostics system. 2. To standardize the diagnosis of emissions and drivability-related faults, starting from 1996, all new cars sold in the U.S. must have similar diagnostic tools, fault codes, and repair procedures, i.e., comply with the OBDⅡ program regulations. 3. With the increasing globalization of the economy and the internationalization of automobiles, the OBDⅡ system, as the foundation for drivability and emissions diagnosis, will be implemented and applied more widely. The OBDⅡ program makes automotive fault diagnosis simple and uniform, eliminating the need for maintenance personnel to learn each manufacturer's new system separately.