Real-time parameters: RPM, speed, pedal position, spark advance, airflow rate, coolant temperature, etc. Status of “Check Engine” light Emission readiness status Freeze frame: a “snapshot” of parameters at the time a trouble event has occurred. Diagnostic trouble codes (DTCs). Oxygen sensor test results Vehicle Identification Number (VIN) Number of ignition cycles AllData, AutoData, OBD Data, Gds, Kds, Haynespro, Workshopdata, DrCar, Professional car repair Number of miles driven with MIL on