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:
Arming the alarm
- Press the Lock button on the remote key.
One long flash of the turn signals will confirm
that the alarm is armed.
Alarm confirmation settings can be changed in
MY CAR, under Car settings
...
Tailgate wiper and reverse gear
If the windshield wipers are on and the transmission
is put into reverse gear, the tailgate
wiper will go into intermittent wiping function1.
This function is deactivated when a different
gear ...
Steering wheel keypad
Standard steering wheel keypad
1 - Left/right arrow keys: A short press moves between preset radio stations
or tracks on a disc. Press and hold to search within tracks or to tune to the next/prev ...
