Car scanner is a vehicle / car performance / trip computer / diagnostics tool and scanner that uses an obd ii wi-fi or bluetooth 4.0 (bluetooth le) adapter to connect to your obd2 engine management / ecu.. See what your car is doing in realtime, get obd fault codes, car performance, sensor data and more! car scanner is a vehicle / car performance / trip computer / diagnostics tool and scanner that uses an obd ii wi-fi or bluetooth adapter to connect to your obd2 engine management / ecu..