P0444: Evaporative Emission Control System Purge Control Valve Circuit Open
Can you still drive? Yes, the vehicle drives normally with this code. Only the EVAP emissions system is affected, so no performance or safety concerns exist.
What Does P0444 Mean?
Code P0444 specifically indicates an open circuit condition in the EVAP purge control valve wiring. The ECM cannot detect any electrical connection to the purge valve solenoid, meaning the wire is broken, the connector is disconnected, or the solenoid coil inside the valve has failed open. This is more specific than the general P0443 circuit malfunction code.
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Browse OBD-II Scanners on AmazonCommon Causes
- Broken wire in the purge valve circuit
- Disconnected purge valve connector
- Open coil inside the purge valve solenoid
- Corroded terminals causing loss of contact
- Rodent damage to wiring harness
Symptoms
- Check engine light on
- Failed emissions test
- Slight fuel odor from vehicle
- No other noticeable drivability symptoms
Diagnostic Steps
- 1Inspect the purge valve connector to ensure it is fully seated
- 2Check the purge valve solenoid coil resistance with a multimeter
- 3Trace the wiring from the ECM to the purge valve checking for breaks
- 4Look for signs of rodent damage or chafing on the wiring harness
- 5Replace the purge valve if the solenoid coil reads open circuit
Recommended Parts & Tools
wiring repair kit
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $30 - $200 |
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Frequently Asked Questions
What does an open circuit mean?
An open circuit means there is a break in the electrical path, preventing current from flowing. It is like a wire that has been cut. The ECM cannot communicate with or control the purge valve.
Can a disconnected connector cause P0444?
Yes, if the electrical connector at the purge valve is unplugged, loose, or corroded enough to lose contact, it will cause an open circuit condition and trigger P0444.
Community Fix Reports
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