Emissions Diagnosis For State I/M Programs
WARNING: This page is about a different car, the 2022 Cadillac CT4. 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
The ECM turns ON the MIL and stores a DTC when the on-board diagnostic system detects a condition that could result in excessive emissions.