Tests For All-Wheel-Drive and Vehicles Specially Equipped For the Handicapped
Some 1996 and newer all-wheel-drive and some vehicles specially equipped for the handicapped cannot be tested using a dynamometer test. These vehicles are tested for emissions through the Two-Speed Idle tailpipe test, using a sensor-probe inserted into the tailpipe to measure emissions while the vehicle's transmission is in neutral.
Vehicle emissions testing is the State's most effective way to improve air quality.
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