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:
Tire wear
Tire rotation
Your vehicle has no required tire rotation. Tire
wear is affected by a number of factors such
as tire inflation, ambient temperature, driving
style, etc.
NOTE
• If the tires are ro ...
Options and accessor
Optional or accessory equipment described in
this manual is indicated by an asterisk.
Optional or accessory equipment may not be
available in all countries or markets. Please
note that some vehi ...
Volvo's recommendations
Why does Volvo believe that no child should sit in the front seat of a car? It's
quite simple really. A front airbag is a very powerful device designed, by law,
to help protect an adult.
Beca ...
