Diagnostic Aids

WARNING: This page is about a different car, the 2022 Cadillac CT5. However, it is still accessible from the selected car via links, so may be relevant.

The following conditions could cause DTC P146B 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