An OBD-II (On-Board Diagnostics II) diagnostic scanner is used to diagnose and troubleshoot problems with a vehicle’s engine, transmission, and other systems.
OBD-II is a standard diagnostic system implemented in all vehicles since 1996, designed to monitor the performance of various systems in a vehicle, including the engine, transmission, and emissions systems. The OBD-II system comprises sensors, several control modules, and a diagnostic connector under the vehicle’s dashboard.
A diagnostic scanner is a hand-held device that can be plugged into the diagnostic connector to read diagnostic trouble codes (DTCs) stored in the vehicle’s computer. DTCs are codes that indicate specific problems with the vehicle’s systems. The scanner can also display live data readings from the various sensors on the vehicle, which can help diagnose problems.
OBD-II scanners, such as YOUCANIC UCAN-II full system scanners, can be purchased by consumers or professional mechanics.