CUSTOMER CONCERN The check engine light is on with DTC P0448 stored. CAUSE Command testing of the EVAP vent valve and its external filter confirmed that the canister vent-control valve was stuck closed. CORRECTION Remove and replace the EVAP canister vent-control valve.

CUSTOMER CONCERN The check engine light is on with DTCs P2450 and P0442 stored. CAUSE The confirmed failure is the fuel-vapor vent valve in the evaporative-emissions system. CORRECTION Remove and replace the EVAP fuel-vapor vent valve.