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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Detachable trailer hitch
Overview
A Ball holder
B Locking bolt
C Cotter pin
D Hitch assembly
E Safety wire attachment
Installing the ball holder
1. If necessary, remove the cotter pin from
the locking bolt and slide ...
Fog on the inside of the windows
The defroster function should be used to
remove fog or mist from the inside of the windows.
Keeping the windows clean with a commercially
available window washing spray will
also help prevent f ...
Volvo's concern for safety
Safety is the Volvo cornerstone. Our concern
dates back to 1927 when the first Volvo rolled
off the production line. Three-point seat belts
(a Volvo invention), safety cages, and energyabsorbing
i ...
