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:
Setting a time interval
Controls and display
3 Time interval: Increase/decrease
6 Time interval: On, while it is being set
7 Time interval: On, after it has been set
Press to increase the interval
or to
decrease ...
It's the little things that count
Storage Compartments (Puny, Fair, Ample, Galore): Fair
Cargo/Trunk Space (Puny, Fair, Ample, Galore): Ample ...
SIRIUS ID
The SIRIUS ID (sometimes referred to as the
Electronic Serial Number or ESN) is required
when contacting the Sirius Call Center. It is
used to activate your account and when making
any account ...
