Diagnostic Aids
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.
The following conditions could cause DTC P0446 to set:
- Cold Regions = Ice / Snow @ Evaporative Emission Vent FilterorEvaporative Emission Canister Air Inlet Hose
- Dry Regions = Dirt / Dust / Sand @ Evaporative Emission Vent FilterorEvaporative Emission Canister Air Inlet Hose
- Wet Regions = Mud @ Evaporative Emission Vent FilterorEvaporative Emission Canister Air Inlet Hose