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:
Spin control (SC)
The spin control function is designed to help
prevent the drive wheels from spinning while
the vehicle is accelerating. ...
Front seats
Front seats
1 Lumbar support: turn the control for firmer
or softer lumbar support.
2 Front-rear adjustment: lift the bar and
move the seat to the position of your
choice.
3 Raise/lower fro ...
Introduction
Display when the radio is receiving an HD Radio broadcast
NOTE
HD radio volume may fade in and out at times due to coverage limitations.
HD radio is a brand name registered by the Ibiquity d ...
