P0444: Evaporative Emission System Purge Control Valve Circuit Open

What does P0444 mean?

The computer detects an open electrical path to the EVAP purge valve. This valve meters stored fuel vapor into the engine; an open circuit is not the same thing as a loose gas cap or a vapor leak.

Generic OBD-II definition: Evaporative Emission System Purge Control Valve Circuit Open. Confirm applicability in your vehicle service information.

Common causes

• Unplugged purge connector
• Broken feed or control wire
• Open purge-solenoid winding

Symptoms

• Steady check engine light
• Often no noticeable driving change
• EVAP readiness may not complete

Diagnostic focus

A smoke test finds vapor leaks but will not diagnose an electrically open solenoid. Complete the circuit tests before treating this as a tank-sealing problem.

Can I keep driving with P0444?

Severity: Low With normal running and no fuel smell or leakage, arrange an emissions-system check. If you smell strong fuel vapor or see a leak, stop safely and have it inspected; keep ignition sources away.

If the check engine light is flashing or the car runs badly, stop driving and have it checked.

Typical fixes

• Inspect the purge plug and harness
• Check the specified power feed
• Test valve-winding and circuit continuity with power removed

Sources & review

• OBD-Codes.com: P0444
• TroubleCodes.net: generic code definitions

Definitions and diagnostic background checked 2026-11-06. Generic guidance, not a substitute for the service procedure for your exact year, engine, and transmission.