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:
Menu settings
The following pages list the main menus/submenus
and possible selections.
Car key memory
See pages 86 and 57 for more information.
Lock settings
Automatic door locking
Doors unlock
  ...
Confirmation when locking/unlocking the vehicle
Settings can be made in the menu system for
audible and visual confirmation when the vehicle
has been locked or unlocked. With these
functions activated, the following will occur
when the vehi ...
Volvo programs
Volvo On Call Roadside Assistance
Your new Volvo comes with a four year ON
CALL roadside assistance. Additional information,
features, and benefits are described in a
separate information packa ...
