An OBD-II scanner is the second version of the On-Board Diagnostics tool, which monitors engine functions. If a vehicle's engine experiences a malfunction, the "Check Engine" light comes on. An OBD-II scanner can access the resulting trouble

OBD2 (or OBD-II) is a standard for car computers that was introduced in 1996. In order to make maintaining cars simpler and less expensive, the EPA made a rule that all cars in the United States had to use a common type of internal diagnostics.

The traditional scan tool uses an interface that plugs into the OBD-II J1962 interface located close to the vehicle’s steering column. Some tools require you to connect the device to a computer to read the diagnostic information, but others are dedicate