DTC P0449: EVAP Control System Vent Valve - Solenoid Circuit Malfunction: Condition
WARNING: This page is about a different car, the 2002 Suzuki XL-7. However, it is still accessible from the selected car via links, so may be relevant.
DTC P0449 is set when monitored signal of EVAP Canister Vent Valve (EVAP-CVV) is different from command signal. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles.