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:
Inflation pressure
Tire inflation pressure table
The following tire pressures are recommended by Volvo for your vehicle. Refer
to the tire inflation placard (see page 273 for its location) for information specific
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When playing a video DVD, a disc menu may
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Towing a trailer
The maximum weights recommended by Volvo
for trailers with brakes are shown in the table
below.
Recommended hitch tongue load: not more
than 10% of the trailer's weight. The trailer
load should ...
