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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Random
This function plays the audio files on the external
device in random order (shuffle). This function
can be activated/deactivated under:
Bluetooth menu
Random
Press the buttons on the cente ...
Environment
Volvo is passionately committed to protecting our environment. Along with
safety, environmental protection is a cornerstone of the Volvo brand,
commensurate with the company's philosophy to protect ...
Parking the vehicle in warm weather
If your vehicle has been parked in the sun in
warm weather, opening the windows and
moonroof for several minutes before driving
will help release the warm air from the passenger
compartment. When ...
