P0444 Evaporative Emission Control System Purge Control Valve Circuit Open

P0444 indicates an open circuit in the EVAP purge control valve circuit. The purge solenoid electrical path is not complete when the module expects control.

Code details

Generic OBD-II · P0

System: Emissions
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace the charcoal canister for an open purge circuit; start with the purge solenoid and its wiring.

Symptoms of P0444

Check-engine light, often with no obvious change in how the car drives.
A failed emissions test or incomplete readiness monitors.
Sometimes a faint fuel-vapour smell (on EVAP codes).

Common causes of P0444

A worn catalytic converter or an oxygen/air-fuel sensor reading out of range.
EVAP leaks — a loose or failed gas cap, cracked hose, or purge/vent valve.
Exhaust leaks, fuel-trim problems, or a fault in a related monitor.

Useful checks before replacing parts

Check purge valve connector fit, terminal tension, power feed, control wire continuity, and harness damage near the engine.
Command the purge valve with a scan tool if available and compare command state with circuit voltage and valve response.
Inspect fuses, shared feeds, and related EVAP circuit codes that can identify a common electrical fault.

Related OBD-II codes

These nearby emissions entries can help compare wording and pin down the fault area.