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What is the function of the car OBD interface?

1 Answers

MayaRose

07/24/25 11:35pm

The functions of the car OBD interface are: 1. It can view car data in real time; 2. Read fault codes, providing convenience for car repairs, developing car-related functions, and modifying car equipment. The car OBD, also called the On-Board Diagnostics system, can detect the working status of the engine's electronic control system and other functional modules of the vehicle during operation. Car OBD fault codes: 1. The first letter indicates the system that set the fault code; 2. The second character is 0, 1, 2, or 3, with the following meanings: 0 indicates a generic fault code defined by the Society of Automotive Engineers, 2 indicates an extended fault code defined by the car manufacturer, 2 or 3 indicates it varies with the system character; 3. The third character indicates the system with the fault: 1 indicates a fuel or air metering fault, 2 indicates a fuel or air metering fault, 3 indicates an ignition fault or engine misfire, 4 indicates an auxiliary emission control system fault, 5 indicates a car or idle control system fault, 6 indicates a computer or output circuit fault, 7 indicates a transmission control system, 8 indicates a transmission control system; 4. The last two characters indicate the conditions that triggered the fault code.

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