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 ...
Phone book
The hands-free system uses two phone books (one with the cell phone's list of
contacts and one with contacts saved directly in the infotainment system), which
are combined to form one phone bo ...
Cold weather precautions
If you wish to check your vehicle before the
approach of cold weather, the following advice
is worth noting:
• Make sure that the engine coolant contains
50 percent antifreeze. Any other mixture
...
