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:
Family-friendly features
One of the areas where the XC60 really shines is in its simple Scandinavian
interior. The designers tried to replicate the sensation of peace and
tranquility they experience on the Swedish coastli ...
Power door mirrors
The mirror control switches are located on the
driver's door armrest.
Driver's side: Press the L button (a light in the
switch will light up) to activate the adjustment
control and then use th ...
Driver Alert Control (DAC)– introduction
This function is intended to alert the driver if his/her driving becomes erratic,
such as if the driver is distracted or fatigued.
NOTE
The camera has certain limitations, see page 160.
A ...
