What to Do When the Car OBD Light Is On?

[LeElliana]

If the car's OBD light is on, you can take it to a repair shop or a 4S store for professional inspection. The illumination of the OBD light indicates an issue with the vehicle's electronic control system or exhaust emissions. OBD refers to the On-Board Diagnostics system, which consists of a scanner, oscilloscope, and interface. It automatically diagnoses the vehicle's condition and sends fault codes to maintenance personnel, enabling them to quickly locate the problem. If the car's 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 OBD interface without writing programs, and the OBD system has self-protection features—writing programs requires entering the correct password. Generally, for safety reasons, it is advisable not to arbitrarily occupy the car's OBD interface.