Conway KW870 OBD2 Functions and Features: 1. Applicable to all OBD II enabled vehicles, including gasoline and diesel vehicles - domestic and imported. 2. Features a unique patented one-touch ready key for quick status emission readiness checks and drive cycle verification. 3. Bright color-coded LEDS indicators and built-in speaker provide visual and audible cues for readiness verification 4. Retrieve generic (P0, P2, P3 and U0), manufacturer specific (P1, P3 and U1) codes and pending codes 5. Easily determine the cause of Check Engine Light (MIL) 6. Turn off check engine light (MIL), clear code and reset monitor 7. Enhanced OBD2 Mode 6 In-vehicle monitoring test results for specific monitored systems. 8. Display monitor and I/M ready status (drain) 9. Read real-time PCM data stream 10. Display real-time O2 sensor test data