The crp 123 obd2 scanner is perfect balance of power and affordability, providing the ability to view, preset, or user defined, live data streams for engine, at, abs and srs data, ; the ability to graph, record, replay and print data, read and reset codes for engine/abs/srs/transmission system. main functions of launch crp123: 1. retrieves generic (p0, p2,p3 and u0), manufacturer specific (p1, p3 and u1) codes, and pending codes 2 .easily determines the cause of check engine light 3. turns off mil, clears codes and resets monitors 4. views freeze frame data, displays live o2 sensor test data 5. displays monitor and i/m readiness status 6. reads live pcm data stream 8.performs modules present test 9.enhanced obd ii mode 6, retrieves vehicle information (vin, cin and cvn ) 10.graphs display, data record& replay and dtcs tips guide users to the root cause of trouble code faster, saving diagnosing and repairing time 11.prints data via pc