2 In 1 Strong Combination: AUTOPHIX BAS300 PLUS Battery Tester and OBD2 Scanner = 12V Battery Tester + OBD2 Scanner. Why Choose AUTOPHIX BAS300 PLUS?. Autophix BAS300 PLUS obd2 scanner Built-in Code Definition.Enter the fault codes you got and enter them to get the code definitions and locate the bad parts of your vehicle.