AutoCodes – Subaru – P1447 Subaru

P1447 Subaru Code - Fuel Tank Sensor Control Valve Circuit High

Quick Answer

P1447 Subaru indicates Fuel Tank Sensor Control Valve Circuit High. Common causes include Faulty Fuel Tank Sensor Control Valve, Fuel Tank Sensor Control Valve harness is open or shorted, Fuel Tank Sensor Control Valve circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1447 Subaru indicates Fuel Tank Sensor Control Valve Circuit High.
Common causes: Common causes include Faulty Fuel Tank Sensor Control Valve, Fuel Tank Sensor Control Valve harness is open or shorted, Fuel Tank Sensor Control Valve circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 5,469

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Aug 22, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1447 Subaru Description

OBDII Code P1447 Subaru - Fuel Tank Sensor Control Valve Circuit High - AutoCodes.com — P1447 Subaru Code - Fuel Tank Sensor Control Valve Circuit High

What does this mean?

What are the Possible Causes of the DTC P1447 Subaru?

Faulty Fuel Tank Sensor Control Valve
Fuel Tank Sensor Control Valve harness is open or shorted
Fuel Tank Sensor Control Valve circuit poor electrical connection

How to Fix the DTC P1447 Subaru?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1447 Subaru code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1447 Subaru code?

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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 P1447 Subaru Code

1. What does the OBDII code P1447 mean for a Subaru?

The P1447 code indicates a high voltage issue in the Fuel Tank Sensor Control Valve circuit, which is part of the evaporative emissions system.

2. What are the common symptoms of code P1447 on a Subaru?

Symptoms may include an illuminated check engine light, reduced fuel efficiency, difficulty refueling, or a noticeable fuel odor near the vehicle.

3. What causes the P1447 code to appear in a Subaru?

Common causes include a faulty fuel tank sensor control valve, damaged wiring or connectors in the circuit, or an issue with the vehicle's ECM.

4. How can I diagnose the P1447 code on my Subaru?

Start by inspecting the fuel tank sensor control valve, wiring, and connectors for damage or corrosion. Use a multimeter to test the circuit and confirm the valve's functionality.

5. Can a loose gas cap trigger the P1447 code in a Subaru?

While a loose gas cap is unlikely to directly cause the P1447 code, it can lead to other evaporative system issues. Always ensure the gas cap is properly tightened.

6. Is it safe to drive with the P1447 code on my Subaru?

Driving with the P1447 code is generally safe, but ignoring it can lead to reduced fuel efficiency and potential emissions test failures.

7. How do I fix the P1447 code on a Subaru?

Repair options include replacing the faulty fuel tank sensor control valve, repairing damaged wiring, or replacing the ECM if necessary.

8. Can the P1447 code clear itself after repairs?

The code may clear itself after successful repairs and several drive cycles, or you can use an OBDII scanner to reset it manually.

9. How much does it cost to fix the P1447 code on a Subaru?

Repair costs can range from $50 to $300, depending on whether you need to replace the valve, repair wiring, or address ECM issues.

10. How can I prevent the P1447 code from recurring on my Subaru?

Regularly inspect and maintain the evaporative emissions system, including checking for damaged wiring, ensuring proper gas cap seals, and addressing small issues promptly.