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:
Compliance
FCC/IC common sentence
This device complies with Part 15 of FCC Rules and RSS-Gen of IC Rules. Operation
is subject to the following two conditions: (1) this device may not cause interference,
an ...
Random
This function plays the audio files on the external device in random order (shuffle).
This function can be activated/deactivated under:
Bluetooth menu - Random
Press the buttons on the center
c ...
Glove compartment ligh
The light in the glove compartment comes on
or switches off when its door is opened or
closed. ...
