About OBD2 Scanner
An OBD2 scanner connects to your car in order to diagnose any problems. Most models display an error code on their screen, which can then be used to determine the exact faults that your car is suffering. Some models may also include an interface that enables them to connect to a laptop or computer. The most advanced models include an information disk so that it gives instant access to details of the problem.
Most modern cars have a multitude of sensors and systems that are used to detect problems with the engine and other components of the car. Taking your car to a garage or dealer means that they will connect diagnostics software to the car and use the information provided to help them diagnose a problem. An OBD2 scanner offers the same functionality but can be used at home and without the need to visit the garage.
An OBD2 scanner not only displays error codes, but can be used to reset any warning lights that appear on the car dash or console. Usually, this is a simple matter of clicking the erase option from the scanner, although different models will have different requirements and instructions.
An OBD2 scanner should be easy to operate. Ordinarily, it is only necessary to turn the ignition on and then plug the scanner into the OBD port of the car. While some diagnostics machines will only work with engine faults and engine fault codes, there are those that will work with the ABS and electrical systems in your car as well.