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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Continued
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Inflatable Curtain
The Inflatable Curtain (IC)
This system consists of inflatable curtains
located along the sides of the roof liners,
stretching from the front side windows to the
rear edge of the rear side windo ...
Oil volume
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