P0444 - Evaporative Emission Control System Purge Control Valve Circuit Open

The EVAP purge valve circuit is open.

Code Overview

The EVAP purge valve circuit is open.

Common Causes

• Loose fuel cap or EVAP leak
• Failed purge or vent valve
• Pressure sensor or wiring issue

Diagnostic Steps

1. Inspect the fuel cap and EVAP hoses first
2. Check purge and vent valve operation
3. Use smoke testing if the leak is not obvious

Likely Repairs & Cost Guides

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

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

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