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:
Introduction
The laminated panoramic roof is divided into
two sections.
• The rear glass section is fixed in place and
cannot be moved.
• The front glass section can be slid horizontally
to the open or clo ...
How can my vehicle fail OBD II emission inspection?
Your vehicle can fail OBD II emission inspection
for any of the following reasons.
• If your Check Engine (MIL) light is lit, your
vehicle may fail inspection.
• If your vehicle's Check Engine l ...
Radio text
Certain stations broadcast program information,
which can be shown in the display.
1. Press the MENU button.
2. Select RADIOTEXT in the menu and press
ENTER.
Select RADIOTEXT again to deactiv ...
