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.
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Roof loads
Using load carriers
Load carriers are available as Volvo accessories. Observe the following points
when in use:
To avoid damaging your vehicle and to achieve maximum safety when driving,
we ...
Temporary Spare
Spare tireThe spare tire in your vehicle is called a "Temporary
Spare".
Recommended tire pressure (see the placard
on the B-pillar or on the fuel filler door) should
be maintained irr ...
Refrigerator
The refrigerator is located under the cover in
the front seat center armrest. Use the button
(see the inset illustration) to adjust the level of
cooling.
The refrigerator functions when the en ...
