Bluetooth ELM327 OBD2 Car Diagnostic Scanner Scan Tool - Read and Clear Diagnostic Trouble Codes Read diagnostic trouble codes, both generic and manufacturer-specific, and display their meaning (over 3000 generic code definitions in the database). Clear trouble codes and turn off the MIL ("Check Engine" light) 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. Very easy to install. Wireless Bluetooth connection to your computer. Bluetooth Password: 1234. Package included:1 x ELM327 Unit (Bluetooth version), 1 x CD Drive.