P0447: Evaporative Emission Control System Vent Control Circuit Open
Can you still drive? Yes, the vehicle is safe to drive. You may experience minor issues when refueling, such as the pump nozzle shutting off prematurely.
What Does P0447 Mean?
Code P0447 indicates an open circuit in the EVAP vent control valve, which is typically located near the charcoal canister. The vent valve controls airflow into the EVAP system and is essential for both normal purging and leak detection tests. An open circuit means the ECM cannot command the vent valve, preventing proper EVAP system operation.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Open coil in the vent control valve solenoid
- Broken or disconnected wiring to the vent valve
- Corroded vent valve connector
- Rodent damage to wiring near the charcoal canister
- Failed vent valve actuator
Symptoms
- Check engine light on
- Failed emissions test
- Possible difficulty refueling
- Fuel odor near the vehicle
Diagnostic Steps
- 1Locate the EVAP vent valve near the charcoal canister, typically under the vehicle near the fuel tank
- 2Check the vent valve connector for secure connection and corrosion
- 3Measure vent valve solenoid resistance with a multimeter
- 4Inspect wiring from the ECM to the vent valve for breaks or damage
- 5Replace the vent valve if the solenoid reads open circuit
Recommended Parts & Tools
EVAP vent valve
wiring repair kit
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $50 - $250 |
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Chat with AI About P0447Commonly Affected Vehicles
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Frequently Asked Questions
Where is the EVAP vent valve located?
The vent valve is usually located near the charcoal canister, which is typically mounted underneath the vehicle near the fuel tank or in the rear wheel well area. On some vehicles it may be in the engine bay.
Can P0447 cause hard starting?
Not directly. However, if the vent valve is stuck closed, it could create a vacuum in the fuel tank that makes it harder for the fuel pump to deliver fuel, potentially causing extended cranking in rare cases.
Community Fix Reports
Community reports are user-submitted and not verified by Auto AI Buddy. Results may vary.
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