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:
Inflation placard
Tire inflation placard ...
Using City Safety
NOTE
The City Safety™ function is activated automatically
each time the engine has been
switched off and restarted.
On and Off
In certain situations, it may be desirable to
switch City Safety ...
Automatic car wash
• We do NOT recommend washing your car
in an automatic wash during the first few
months (because the paint will not have
hardened sufficiently).
• An automatic wash is a simple and quick
way ...
