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 Professional car repair Number of miles driven with MIL on
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