DTC P0449: EVAP Vent Solenoid Valve Control Circuit: Description

An ignition voltage is supplied to the Evaporative Emission (EVAP) canister vent valve. The control module grounds the EVAP canister vent valve control circuit to close the valve be means of an internal switch called a driver. The scan tool displays the commended state of the EVAP canister vent valve as ON or OFF. The control module monitors the status of the driver. If the control module detects an incorrect voltage for the commanded state of the driver, this DTC sets.