The Air Care Colorado Inspection and Maintenance (I/M) Program is a network of 18 facilities conveniently located throughout the Denver-metropolitan area and the North Front Range. Additionally, 18 RapidScreen roadside data collection units are set up and rotated among state-approved locations throughout the program area.
Depending upon the vehicle, Air Care Colorado facilities use three different methods to evaluate emissions as part of the overall inspection. They are:
1982-and-newer vehicles: I/M24o dynamometer “treadmill” or On-Board Diagnostics (OBD) “plug-in” test
1981-and-older vehicles: two-speed idle test