Vehicle CEL Doctor: Locate bad O2 sensor,  turn off check engine light,  reset monitor, read enhanced data. The obd2 scanner can quickly read and erase DTC (engine fault codes). Access to emissions readiness status, on-screen DTC definitions, built-in DTC look up library, allow you accurately determine causes of check engine light, and turn off the MIL(Malfunction Indicator Lamp). Automatic VIN acquisition and decoding make it easier to read manufacturer specific codes and enhanced mode 6 data.