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What is the definition of an OBD interface?

1 Answers

LeCharlotte

07/29/25 1:34pm

Definition of OBD interface: OBD is the abbreviation of On-Board Diagnostic, which translates to "On-Board Diagnostic System". This system continuously monitors the operating conditions of the engine and the working status of the exhaust after-treatment system. Once it detects a situation that may cause excessive emissions, it will immediately issue a warning. The following are four functions of the OBD interface in vehicles: 1. Display of vehicle computer data: The OBD interface can provide various operational data of the vehicle, such as data displayed on the vehicle dashboard, fuel consumption records, battery voltage, air-fuel ratio, throttle opening, knock count, etc.; 2. Reading fault codes: The OBD interface can be used to read fault codes, which helps quickly diagnose vehicle faults and reduces the time required for manual diagnosis; 3. Changing codes to achieve more functions: By connecting the vehicle's CAN bus through the OBD interface data cable and adjusting the codes of various modules, many different "hidden" functions can be enabled, achieving "additional configurations"; 4. Reading and flashing ECU/TCU programs: This allows manufacturers to update the control programs of the ECU at any time, but it is not recommended to modify them yourself.

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