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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All Wheel Drive – AWD
Your Volvo can be equipped with permanent All Wheel Drive, which means that power
is distributed automatically between the front and rear wheels. Under normal driving
conditions, most of the eng ...
Brake system
The brake system is a hydraulic system consisting of two separate brake circuits.
If a problem should occur in one of these circuits, it is still possible to stop
the vehicle with the other brake ...
Skip options
This function is used to remove a channel from the list of available channels.
Skipping a channel
1. Press OK/MENU.
2. Scroll to the Advanced settings menu.
3. Press OK/MENU to enter the Skip opti ...
