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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Safety
Superb safety is a cornerstone of any new Volvo, and the new C70 sets the
standard in the convertible class. It is full of innovative safety solutions and
offers similar safety standards to a salo ...
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Vehicle Overview
New brushed-aluminum roof rails and an eggcrate grille go on 2005 XC70s. A
trip computer and rear armrest are also now standard. The headlights and
taillamps have been restyled, new front and rear ...
