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 ...
Warning light—driver braking required
Adaptive Cruise Control can exert brake force that is equivalent to approximately
40% of the vehicle's total braking capacity. In situations requiring more brake
force than ACC can provide and ...
Storing preset stations
Ten preset stations can be stored for each
waveband (AM, FM1, etc.).
Stored preset stations are selected using the
number key buttons on the center console.
Manually storing preset stations
1. ...
