Buick Enclave persistent check engine light on with potential purge valve and canister vent solenoid issues on Buick Enclave

Some Buick Enclave owners report experiencing persistent check engine light issues potentially related to the purge valve and canister vent solenoid. These concerns may stem from a technical service bulletin issued by GM regarding problems with the evaporative emissions purge valve in select 2019 models. In some cases, owners find that replacing the solenoid for the evaporative canister purge valve resolves the issue, with warranty coverage available. Additionally, a full canister may necessitate the replacement of both the purge solenoid and the vent valve. After addressing the underlying issue, some owners successfully reset the check engine light by disconnecting and reconnecting the battery. It's important to note that the purge valve should make a noise when activated, indicating proper function, and both original and replacement valves may operate correctly if no fault codes are present. To effectively resolve the check engine light concern, addressing the potential issues with the purge valve and canister vent solenoid is advisable.