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:
Cleaning the brake discs
Coatings of dirt and water on the brake discs
may result in delayed brake function. This delay
is minimized by cleaning the brake linings.
Cleaning the brake pads is advisable in wet
weather, p ...
Returning to mode I from mode II
With the remote key fully pressed into the ignition
slot, press START/STOP ENGINE briefly. ...
Settings
Press OK/MENU when a normal camera view is displayed and make the desired settings.
Parking camera settings
Mark Park Assist lines to display the sidelines while backing up.
Mark Distance info ...
