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Engine-Codes – Subaru – P0444 Subaru

P0444 Subaru Code - Evaporative Emission Control System Purge Control Valve Circuit Open

Quick Answer

The P0444 diagnostic trouble code (DTC) for Subaru vehicles indicates a fault with the evaporative emission control system purge control valve circuit being open. Common causes include Faulty evaporative emission control system purge control valve, Broken or loose wiring in the circuit, Corrosion or damage to electrical connectors. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means
P0444 Subaru indicates Evaporative Emission Control System Purge Control Valve Circuit Open.
Common causes
Common causes include Faulty evaporative emission control system purge control valve, Broken or loose wiring in the circuit, Corrosion or damage to electrical connectors.
Severity
Low - monitor the vehicle and repair when practical.
Can I drive?
The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code P0444 Subaru Description

The P0444 diagnostic trouble code (DTC) for Subaru vehicles indicates a fault with the evaporative emission control system purge control valve circuit being open. This system is responsible for controlling the release of fuel vapors from the fuel tank into the engine's intake manifold. The purge control valve regulates this process by opening and closing as needed to maintain proper emissions levels.

OBDII Code P0444 Subaru - Evaporative Emission Control System Purge Control Valve Circuit Open
P0444 Subaru Code - Evaporative Emission Control System Purge Control Valve Circuit Open

Common Causes of P0444 Subaru

  1. Faulty evaporative emission control system purge control valve
  2. Broken or loose wiring in the circuit
  3. Corrosion or damage to electrical connectors
  4. PCM failure
  5. Vacuum leaks in the system

Symptoms of P0444 Subaru

  1. Check engine light illuminated on the dashboard
  2. Decreased fuel efficiency
  3. Rough idling or stalling
  4. Strong fuel odor
  5. Failed emissions test

How to Fix P0444 Subaru

  1. Use a diagnostic scanner to verify the P0444 code and confirm the issue.
  2. Inspect the wiring and connectors for any damage or corrosion, repairing or replacing as needed.
  3. Test the evaporative emission control system purge control valve to ensure it is functioning properly. Replace if faulty.
  4. Clear the DTC and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnosis may be required to identify any underlying issues.

Cost to Fix P0444 Subaru

The cost of repairing a P0444 code on a Subaru vehicle can vary depending on the specific cause of the issue. In general, replacing a faulty purge control valve or repairing wiring/connectors can range from $100 to $300 for parts, with additional labor costs ranging from $100 to $200. Overall, the total repair cost could range from $200 to $500. It's important to note that these are rough estimates and actual costs may vary based on location, vehicle make and model, and labor rates. It's recommended to consult with a mechanic or auto repair shop for a more accurate quote.

When is the Code Detected?

- An excessively low voltage signal is sent to ECM through the valve

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0444 Subaru Code

1. What does OBDII code P0444 in a Subaru indicate?

The code P0444 in a Subaru refers to a problem in the Evaporative Emission Control System Purge Control Valve Circuit, specifically an open circuit issue.

2. What are the common symptoms of OBDII code P0444 in a Subaru?

Common symptoms of P0444 in a Subaru may include the illumination of the Check Engine Light, rough idling, decreased fuel efficiency, and potential difficulty starting the vehicle.

3. What causes the OBDII code P0444 in a Subaru?

Possible causes of P0444 in a Subaru include a faulty purge control valve, damaged wiring or connectors in the purge control valve circuit, or a malfunctioning ECM (Engine Control Module).

4. How can I diagnose the OBDII code P0444 in my Subaru?

Diagnosing P0444 in a Subaru involves using an OBDII scanner to retrieve the trouble code, checking the wiring and connectors related to the purge control valve, and testing the purge control valve itself for proper operation.

5. Can I continue driving my Subaru with the P0444 code?

While the vehicle may still be drivable with the P0444 code, it is advisable to have the issue diagnosed and repaired promptly to prevent potential damage to the engine or emissions system.

6. How can I repair OBDII code P0444 in my Subaru?

Repairing P0444 in a Subaru typically involves replacing the faulty purge control valve, repairing any damaged wiring or connectors, and clearing the trouble code with an OBDII scanner.

7. Is it possible to reset the OBDII code P0444 in a Subaru without fixing the issue?

Resetting the code without addressing the underlying problem may temporarily turn off the Check Engine Light, but the code is likely to reappear once the ECM detects the issue again.

8. Can a DIY enthusiast fix the OBDII code P0444 in a Subaru?

Depending on the individual's skill level and access to tools, a DIY enthusiast may be able to address the P0444 code by replacing the purge control valve or fixing wiring issues. However, professional diagnosis is recommended for accurate repair.

9. How much does it cost to repair OBDII code P0444 in a Subaru?

The cost of repairing P0444 in a Subaru can vary depending on the specific issue, parts needed, and labor rates. On average, the repair cost may range from $100 to $300, but it's best to obtain quotes from local mechanics or dealerships.

10. What other related codes might be triggered along with P0444 in a Subaru?

Common related codes that may be triggered along with P0444 in a Subaru include P0440 (Evaporative Emission Control System Malfunction), P0441 (Evaporative Emission Control System Incorrect Purge Flow), and P0443 (Evaporative Emission Control System Purge Control Valve Circuit).

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