Functions: 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: 4) Engine RPM 5) Calculated Load Value 6) Coolant Temperature 7) Fuel System Status 8) Vehicle Speed 9) Short Term Fuel Trim 10) Long Term Fuel Trim 11) Intake Manifold Pressure 12) Timing Advance 13) Intake Air Temperature 14) Air Flow Rate 15) Absolute Throttle Position 16) Oxygen sensor voltages/associated short term fuel trims 17) Fuel System status 18) Fuel Pressure Package Include: 1pcs OB2 2.1V ELM327 Bluetooth Scan Tool