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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Emergency stop
If the seat accidentally begins to move, press
one of the buttons to stop the seat.
WARNING
• Because the driver's seat can be
adjusted with the ignition off, children
should never be left una ...
A/C – ON/OFF
When the indicator light
in the button is on, the air conditioning is controlled automatically. This cools/heats
and dehumidifies the incoming air. When the indicator light in the button is off,
...
Warranty
As you'd expect, the Volvo S40 saloon is supported by a comprehensive
warranty. The standard mechanical warranty is three years/60,000 miles
(whichever comes first), plus there's a three-year, unl ...
