P0447

DTC P0447 EVAP Vent Control Circuit Open

Wiring Diagram:

Circuit Description

An ignition voltage is supplied directly to the evaporative emission (EVAP) canister vent solenoid. The control module grounds the EVAP canister vent solenoid control circuit to close the solenoid by means of an internal switch called a driver. The scan tool displays the commanded state of the EVAP canister vent solenoid as ON or OFF. The control module monitors the status of the driver. If the control module detects low voltage on the control circuit when the driver is commanded OFF, this DTC sets.

Conditions for Setting the DTC

- The EVAP Vent Valve is line break.
- Ignition ON.

Action Taken When the DTC Sets

- The Malfunction Indicator Lamp (MIL) will illuminate.
- The ECM will record operating conditions at the time the diagnostic fail. This information will be stored in the Freeze Frame and Failure Records buffers.
- A history DTC is stored.

Conditions for Clearing the MIL/DTC

- The MIL will turn off at the end of 3 consecutive ignition cycles in which the diagnostic runs without a fault.
- A history DTC will clear after 40 consecutive warm-up cycles without a fault.
- DTC(s) can be cleared by using the scan tool.

Diagnostic Aids

For intermittent conditions refer to Intermittent Conditions. Intermittents
Listen for a click when the solenoid operates. Ensure that both the ON and the OFF states are commanded. Repeat the commands as necessary.

Step 1 - 10:

DTC P0447 - EVAP Vent Control Circuit Open