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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Parking brake
1 Parking brake pedal
2 Handle for releasing the parking brake
The parking brake pedal is located under the
dashboard, to the left of the brake pedal.
NOTE
The indicator light will light up eve ...
Volvo and the environment
Volvo is committed to the well being of its customers.
As a natural part of this commitment,
we care about the environment in which we all
live. Caring for the environment means an
everyday inv ...
Main AM menu
AM menu
Show presets
Scan
Audio settings
Sound stage
Equalizer
Volume compensation
Reset all audio settings ...
