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:
Main FM1/FM2 menu
FM menu
Show radio text
Show presets
Scan
Advanced settings
Reset all FM settings
Audio settings ...
Rearview mirror
To reduce glare from the headlights of following
vehicles, use the control to switch between
the normal and night-driving positions.
A Normal position
B Night position, reduces glare from follow ...
Severe strain on the brake system
The brakes will be subject to severe strain
when driving in mountains or hilly areas, or
when towing a trailer. Vehicle speed is usually
slower, which means that the cooling of the
brakes is less ...
