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:
Continued
This symbol
can be found at the lower right
corner of an odd-numbered (right-hand) page
to indicate that the current topic is continued
on the following page. ...
The Inside
Like the exterior, the C30's cabin is highlighted by a design element,
specifically a flowing center control panel. It's similar to the one in the S40
and V50, and the thin panel is partially sepa ...
Storing a channel
A total of 20 satellite channels can be stored;
10 channels each for Sirius 1 and 2, see page 215 for detailed information on
storing
channels.
• A long press on one of the number keys
stores ...
