AirCare
is one of the
most effective
vehicle emissions testing programs
in North America
learn more . . .
is one of the
most effective
vehicle emissions testing programs
in North America
learn more . . .
Repair Info - Emissions Repair Explained
Overview | Component Testing - Doing It RightComponent Testing - Doing It Right
This section provides general information on the testing of individual components that may cause excess emissions. Because there can be many variations in components from vehicle to vehicle, the technician should refer to the manufacturer's recommended procedures and specifications when performing tests.
Unfortunately, some of the concepts here are quite technical. The intention is not to teach you how to diagnose emissions defects but rather to make it a little less intimidating when discussing repairs with your diagnostic technician. If you are not familiar with any of the terms used in this section, refer to the Emissions Repair Glossary for definitions.

