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:
Maintenance services
Your Volvo passed several major inspections
before it was delivered to you, in accordance
with Volvo specifications. The maintenance
services outlined in the Warranty and Service
Records Informati ...
Paint touch up
Model plate with paint color code
Paint damage requires immediate attention to
avoid rusting. Make it a habit to check the finish
regularly – when washing the vehicle for
instance. Touch-up if n ...
Listening to satellite radio
The Sirius satellite system consists of a number
of high elevation satellites in geosynchronous
orbit.
NOTE
• The digital signals from the Sirius satellites
are line-of-sight, which means that
p ...
