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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About this manual
Before you operate your vehicle for the first time, please familiarize yourself
with the information found in the chapters "Your Driving Environment" and "During
Your Trip.&quo ...
Replacing the high beam bulb (halogenheadlights)
1. Remove the rubber cover by pulling it off.
2. Pull the connector from the lamp housing.
3. Loosen the bulb's retaining spring by first
moving it to the right and then moving it out
of the way ...
Fuel Formulations
Do not use gasoline that contains lead as a
knock inhibitor, and do not use lead additives.
Besides damaging the exhaust emission control
systems on your vehicle, lead has been
strongly linked ...
