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:
About this manual
• Before you operate your vehicle for the first
time, please familiarize yourself with the
information found in the chapters "Your
Driving Environment" and "During Your
Trip.&qu ...
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 ...
Introduction
Volvo recommends the use of Volvo trailer hitches that are specially designed
for the vehicle.
NOTE
See page 337 for the maximum trailer and tongue weights recommended by Volvo.
Observe t ...
