What is the fault when the OBD light is on in Tianlong?

[HarleyFitz]

The illumination of the OBD light in Tianlong indicates an issue with the vehicle's electronic control system or exhaust emissions. The specific situation needs to be checked by professionals at a repair shop or 4S store. Composition of OBD: OBD is the On-Board Diagnostics system. It consists of a scanner, oscilloscope, and interface. Fault Localization: By automatically diagnosing vehicle conditions and sending fault codes to maintenance personnel, OBD enables quick fault localization, providing significant assistance in vehicle maintenance and repair. Interface Occupancy: If the OBD interface is occupied, it is generally only used as a power source and does not affect the vehicle itself. This is because external devices only read data from the vehicle's computer via the OBD interface without writing programs. OBD systems have self-protection functions, and writing programs requires entering the correct password. For safety reasons, avoid arbitrarily occupying the vehicle's OBD interface.