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:
From inside the vehicle (central locking button)
Central locking button
The lock buttons on the door panel can be used
to lock or unlock all doors and the tailgate at
the same time. Press to lock and
to
unlock.
Unlocking
The vehicle ca ...
Bluetooth® hands-free
This feature makes it possible to set up a wireless
connection between a Bluetooth®-enabled
cell phone and the vehicle’s infotainment
system. This enables the infotainment system
to function a ...
Center console controls
Center console controls for menu navigation
1 Press MY CAR to access the My Car
menus.
2 Press OK/MENU to select a highlighted
selection or to store a certain function in
the system's memory ...
