See also:

Readiness for Inspection/Maintenance (I/M) test
A vehicle equipped with All-Wheel Drive (AWD) should never be tested using a two wheel dynamometer (such as the dynamometers used by some states for emissions testing), or similar equipment. M ...

Warning/indicator lights
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Driving on snow or ice
WARNING ● Wet ice (32°F, 0°C and freezing rain), very cold snow or ice can be slick and very hard to drive on. The vehicle will have much less traction or “grip” under these condition ...