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 ...
Driving Impressions
Even when equipped with the automatic transmission, the V50 2.4i accelerates
with spirit, though the engine growls when pushed. Despite a taut suspension,
ride comfort is generally satisfactory, b ...
Automatically folding down the rear seat’s outboard head restraints
1. The ignition must be in mode I or II.
2. Press the button to lower the rear head restraints for improved visibility.
NOTE
The head restraint must be returned to the upright position ma ...
