An OBD2 scanner, short for “On-Board Diagnostics II,” is a device that plugs into a vehicle’s computer system to retrieve and interpret diagnostic trouble codes (DTCs). These codes provide valuable information about a vehicle’s performance, emissions, and other systems, making OBD2 scanners essential tools for both professional mechanics and everyday drivers.
OBD2 scanners have become increasingly important as vehicles have become more complex and computerized. Modern vehicles rely on a network of sensors and electronic control units (ECUs) to monitor and adjust various systems, including the engine, transmission, brakes, and emissions controls. When a problem arises, the ECU stores a DTC that can be retrieved by an OBD2 scanner.
