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.
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Navigating and playing tracks
Turn TUNE to access the device's playlist and
to navigate in this list. Press OK/MENU to
either select a sub-folder or confirm a choice
and begin playback. Press EXIT to cancel and
exit the pl ...
Driving dynamics: chassis, steering and brakes
The new Volvo C30 is a compact and light car. Light weight gives a car extra
agility and reduces fuel consumption. 'This light weight was one of the goals
for the Volvo C30,' says Mr Abrahamsson. 'I ...
Hazard warning flashers
Location of the hazard warning flasher button
The hazard warning flasher should be used to
indicate that the vehicle has become a traffic
hazard.
To activate the flashers, press the button
i ...
