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:
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 159.
A c ...
Controls in the center console
Controls in the center console
1 RADIO
2 MEDIA
3 TEL
4 TUNE
5 OK/MENU ...
Recirculation/air quality system
Recirculation
This function can be used to
shut out exhaust fumes,
smoke, etc., from the passenger
compartment. The air in
the passenger compartment
is then recirculated, i.e., no air
f ...
