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:
Menu structure
FM Menu
1. Radio Text
2. Audio Settings
1. Surround
2. Equalizer Fr
3. Equalizer Rr
4. Reset All
AM Menu
See Audio S ...
Low beam, Halogen
1. Remove the headlight housing from the vehicle (see page 306).
2. Remove the cover over the bulbs (see page 308).
3. Unplug the connector from the bulb.
4. Remove the bulb by pulling it straigh ...
Pedestrian safety
The Volvo V50 Sportswagon has been designed to minimise the risk of injury to
pedestrians and cyclists in the event of an accident. The smoothly shaped front
has an energy-absorbing structure ahea ...
