How do states use OBD II for emission inspections?

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.
See also:
Load anchoring eyelets
The load anchoring eyelets on both sides of the vehicle are used to fasten straps,
etc., to help anchor items in the trunk.
WARNING
Cover sharp edges on long loads to help prevent injury ...
Replacing the daytime running lightbulb (models with Active BendingLights only)
1. Remove the rubber cover over the bulb by
pulling it off.
2. Turn the bulb holder counterclockwise and
pull it out of the headlight housing.
3. Remove the connector from the bulb unit
by pres ...
Replacing batteries in the headphones
The headphones use two AAA batteries.
It is advisable to have extra batteries on hand
during long trips.
Battery cover and retaining screw
1. Unscrew the retaining screw and remove
the batter ...
