What is the purpose of the car OBD interface?

[DiKaylee]

Car OBD interface can monitor the working conditions of the engine electronic control system and other functional modules of the vehicle during operation. By connecting the car's OBD interface to a computer, you can view real-time vehicle data and detect car faults, providing convenience for car repairs, developing car-related functions, and modifying car equipment. OBD, also known as On-Board Diagnostics, monitors in real-time systems and components such as EGR, engine, particulate trap, catalytic converter, oxygen sensor, emission control system, fuel system, etc., including intake manifold pressure, intake temperature, air flow rate, throttle position, oxygen sensor voltage, and fuel pressure.