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:
Replacing the battery in the remote key
The batteries should be replaced if:
• The information symbol illuminates and
Low battery in remote control. Please
change batteries. is shown in the display
and/or
• if the locks do not react ...
How can I prepare for my next OBD II emission inspection?
• If your Check Engine (MIL) light is lit – or
was lit but went out without service, have
your vehicle diagnosed and, if necessary,
serviced by a qualified Volvo technician.
• If you recently h ...
Erasing HomeLink Buttons
To erase programming from the three Home-
Link buttons (individual buttons cannot be
erased but can be “reprogrammed” as outlined
below), follow the step noted:
1. Press and hold the two outer ...
