What is OBD2 Car Scanner?
The OBD-II scanning tool is a device used to access and interpret the data generated by the vehicle’s on-board diagnostic system. OBD-II refers to the second generation of on-board diagnostic systems, a feature that has become mandatory for all vehicles sold in the United States since 1996. The OBD-II system monitors the various components of the car, such as the engine, transmission, and emissions, to ensure that they are functioning properly. If something goes wrong, the system generates an error code that can be read by the OBD-II scanner. Specialized tools like the obd airbag scanner focus on specific subsystems, such as airbag diagnostics, while still connecting via the standardized OBD-II port.
OBD2 stands for “On-Board Diagnostics II”. Prior to 1996, most vehicles had proprietary diagnostic methods requiring manufacturer-specific tools. For example, some automakers like Toyota used simplified techniques, such as short-circuiting terminals and counting check engine light flashes. Since 1996, all cars feature a universal OBD-II port—typically under the driver’s dashboard—enabling compatibility with general or specialized scanners, including the obd airbag scanner for safety system analysis.
Any OBD2 scanner can connect to the port, but not all scanners are created equally. Some will have more features to access more computer information from your vehicle.
How does the OBD-II Scan Tool work?
The scanner connects to the OBD-II port and communicates with the vehicle’s computer to retrieve diagnostic trouble codes (DTCs) from the Engine Control Module (ECM). Advanced scanners can also display real-time sensor data (e.g., RPM, fuel efficiency) and diagnose issues in subsystems like airbags when using an obd airbag scanner.