: A device that plugs into the port to read data. These range from simple "code readers" to advanced bidirectional scan tools. Types of Diagnostic Tools
A "full piece" or complete OBD2 setup typically consists of three integrated layers: : A device that plugs into the port to read data
: A network of up to 70 electronic control modules (ECUs) and sensors—such as oxygen sensors and fuel injectors—that monitor performance in real-time. : A device that plugs into the port to read data