Inspection/Maintenance System Check: Description
WARNING: This page is about a different car, the 2002 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
Due to the nature of the vehicle's designed to run on fuels other than gasoline, some additional procedures may be required in order to set the I/M System Status indicators to YES. Vehicles designed to run on both gasoline and Compressed Natural Gas (CNG) will disable certain diagnostic tests when vehicle is operating on CNG. These vehicles will require operation using gasoline in order for the remaining tests to run. The system set procedures for gasoline vehicles can be used once vehicle is operating on gasoline.