P0444 — Evaporative Emission Control System Purge Control Valve Circuit Open
Can drive — fix at your convenience.
What P0444 means
This code means the engine computer has detected an open electrical circuit in the EVAP purge control valve, meaning the signal isn't completing its path. It's typically caused by a failed purge valve, broken or disconnected wiring, or a corroded connector. Repairs usually involve replacing the purge valve and repairing any open or damaged wiring or connectors.
Common symptoms
- Check engine light is on
- Failed emissions or smog test
- Faint fuel smell in some cases
- Occasional rough idle
- No major change in everyday drivability
Common causes
- Failed EVAP purge control valve
- Broken or disconnected wiring to the purge valve
- Corroded or loose electrical connector
- Open circuit caused by a chafed or cut wire
- Blown fuse on the purge valve circuit
Typical repair cost
$100 – $450
Varies by vehicle and root cause.
Frequently asked questions
Can I keep driving with a P0444 code?
Usually yes. An open purge valve circuit doesn't affect the engine's ability to run, so the car typically drives normally. There's no safety risk, but get it checked within a week or two since it affects emissions.
How much does it cost to fix a P0444?
Most repairs run $100 to $450. The purge valve is relatively cheap, and the variable is how much labor is needed if a wiring break or connector has to be located and repaired.
Is a P0444 code serious?
It's low in severity. It won't leave you stranded or harm the engine, but it keeps the check engine light on and causes an emissions failure, so it should be repaired at a convenient time.
What does circuit open mean in a P0444 code?
It means the electrical path to the purge valve is broken somewhere, so current can't flow to operate it. This usually comes from a failed valve, a disconnected connector, or a broken wire.