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:
Reporting safety defects in Canada
If you believe your vehicle has a defect that
could cause a crash or could cause injury or
death, you should immediately inform Transport
Canada in addition to notifying Volvo Cars
of Canada C ...
Park position (P)
Select the P position when starting or parking.
Shiftlock
When P has been selected, the transmission is
mechanically blocked in this position. The
brake pedal must be depressed and the ignition ...
Fast forward/reverse
Press and hold the buttons to
fast
forward/reverse. This is done at one speed for
audio files but several speeds can be chosen
for video files. Press the buttons
several
times to increas ...
