What it means
The ECU has detected an open circuit in the purge solenoid control line — usually a broken wire, unplugged connector, or open coil winding.
At a glance
- Usually lights the check-engine light
- Affects emissions; the car can fail an emissions test
How it works
The EVAP purge control valve is a solenoid that opens to route fuel vapour from the canister to the engine when commanded. P0444 specifically means the control module detects an open circuit in the purge-valve control path, which can result from a broken wire, disconnected connector, backed-out pin, or an open solenoid winding.
Common causes
Most likely first.
- Purge solenoid winding open
- Wiring or connector fault
- Pin pushed back out of connector body
Symptoms
- Check engine light on
- Possible smell of fuel near tank or engine bay
- Failed emissions inspection
- Loose-cap warning may appear
How to diagnose it
- Confirm P0444 and review related codes and freeze-frame data to check whether the fault is persistent or intermittent.
- Inspect the purge solenoid connector for disconnection, a pin pushed back into the housing, corrosion, or poor terminal fit.
- Trace the purge-control wiring for breaks, damaged insulation, or loose connections, especially near the solenoid and harness bends.
- With the circuit isolated according to the manufacturer's procedure, check continuity through the solenoid winding and control wire.
- If continuity is present at the solenoid and wire, check the circuit connection at the control module using the wiring diagram.
Common fixes
- Reconnect and lock the purge-solenoid connector.
- Reseat or replace a backed-out or damaged connector terminal.
- Repair a broken purge-control wire or damaged harness connection.
- Replace the purge solenoid if its winding is open.
Can I keep driving?
The open circuit usually does not make the vehicle unsafe to drive, but EVAP purge may stop working and emissions testing can fail. If the engine runs roughly or there is a fuel smell, limit driving and have the fault checked soon.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.