Missing or leaking gas caps will cause vehicles to fail the emissions inspection. Vehicles also may be selected randomly for on-going program studies that are continually used by the State of Colorado for quality assurance purposes to evaluate overall program effectiveness.Ī properly functioning gas cap is an essential part of the emissions control system of every vehicle. Sometimes tests may not be performed as part of the overall inspection because the vehicles configuration or onboard computer are preventing communication with the equipment at the Air Care Colorado facility. It is used as part of the inspection for 1981-and-older vehicles.
This is the original type of test that evaluates emissions at two different idle speeds. Vehicles are driven on a device known as a dynamometer that simulates a four-minute driving cycle under a variety of conditions (uphill, downhill, acceleration and more) to evaluate emissions. The I/M240 is the "treadmill" test most commonly identified with emissions inspections in the Denver-metropolitan area and the North Front Range. This includes details about the "Check Engine" light, other dashboard indicators and codes that help determine emissions-related problems for quicker repair and improved performance. OBD is a non-driving test in which the vehicles on-board computer is connected to a computer at the Air Care Colorado facility that accesses various information. Please contact your county Motor Vehicle Office for more specific information.ĭepending upon the age and type of vehicle, the following tests are performed: The vehicle was identified on the road as exceptionally clean by the RapidScreen data collection units and is eligible to skip the next scheduled visit to an Air Care Colorado facility.
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The registration renewal postcard will indicate one of the following:Īn emissions inspection is required due by the end of the month of the registration expiration (an additional one-month grace period is allowed).
NOTE: If your vehicle is registered in a county outside the program area but is driven at least 90 days a year into the program area for employment or school, an emissions inspection is required.
Please check the registration renewal postcard from the home county to determine if your vehicle is due for an inspection. This requirement applies to most vehicles with registered mailing addresses in the seven Denver-metropolitan area and North Front Range counties (Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas, Jefferson, Larimer and Weld). With few exceptions, all gasoline-powered vehicles require emissions inspections once they are over seven years old.
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