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:
Checking and adding oil
Location of the filler cap and dipstick
Volvo recommends Castrol oil products
NOTE
Before checking the oil:
• The car should be parked on a level surface.
• If the engine is warm, wait for at ...
Overview
Center console control panel
1 VOL: Volume control
2 MEDIA button
3 TUNE: Turn to navigate among menu alternatives
and folders shown in the display.
4 OK/MENU: Press to confirm your selection ...
Suspension
The advanced, independent suspension system employs spring struts at the
front, the geometry of which has been carefully calculated to provide quick and
precise steering response, enhancing the ca ...
