How do states use OBD II for emission inspections?

How do states use OBD II for emission inspections? - Emission inspection readiness - Maintaining your car - Maintenance and specifications - Volvo XC60 Owners Manual - Volvo XC60

Many states connect a computer directly to a vehicle's OBD II system. The inspector can then read "faults." In some states, this type of inspection has replaced the tailpipe emission test.

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    Average speed
    The system calculates the average speed from the last resetting. Reset using RESET. ...

    Cargo area lighting
    The cargo area lighting comes on automatically when the tailgate is opened. ...

    Operation
    Settings are made by pressing MY CAR on the center console control panel and using the menus displayed. ...