Functions of the OBD 2 trouble code auto scanner:

1.Read diagnostic trouble codes, both generic and manufacturer-specific, and display their meaning (over 3000 generic code definitions in the database).

2.Clear trouble codes and turn off the MIL ("Check Engine" light)

3.Display current sensor data, including:
Engine RPM;Calculated Load Value;Coolant Temperature;Fuel System Status;Vehicle Speed;Short Term Fuel Trim;Long Term Fuel Trim;Intake Manifold Pressure;Timing Advance;Intake Air Temperature;Air Flow Rate;Absolute Throttle Position;Oxygen sensor voltages/associated short term fuel trims;Fuel System status;Fuel Pressure;Many others.