P0447 - EVAP Vent Control Circuit Open

EVAP vent valve circuit open.

Code Overview

EVAP vent valve circuit open.

Common Causes

• Open circuit in the EVAP vent valve control wiring
• Failed vent valve or solenoid coil
• Loose or corroded connector at the vent valve
• Poor power or ground supply to the vent circuit

Symptoms

• Check-engine light with no major drivability complaint
• Fuel tank may be slow or difficult to fill
• Failed emissions readiness or inspection

Diagnostic Steps

1. Inspect the vent-valve connector and harness for broken or loose wiring
2. Verify power, ground, and control signal at the vent valve
3. Check vent-valve coil resistance if service information supports it
4. Confirm the circuit fault before replacing the valve or module

Repair Difficulty

Moderate

General difficulty estimate for the most common repair path.

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

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Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.