Emissions Diagnosis For State I/M Programs
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Cadillac Escalade EXT. However, it is still accessible from the selected car via links, so may be relevant.
This OBD II equipped vehicle is designed to diagnose any conditions that could lead to excessive levels of the following emissions:
- Hydrocarbons (HC)
- Carbon monoxide (CO)
- Oxides of nitrogen (NOx)
- Evaporative emission (EVAP) system losses
Should this vehicle's on-board diagnostic system (ECM) detect a condition that could result in excessive emissions, the ECM turns ON the MIL and stores a DTC that is associated with the condition.