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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    NOTE Before starting to replace a bulb, see page 306. 1. Loosen the cover's four retaining screws with the tool (1) provided in the vehicle's tool kit (see page 290). The screws sho ...

    Buttons in the center console
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    Air vents in the dashboard
    A - Open B - Closed C - Horizontal airflow D - Vertical airflow Direct the outer air vents toward the side windows to defrost. ...