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Engine-Codes – Ford – P0231 2007 Ford Fusion

P0231 2007 Ford Fusion Code - Fuel Pump Secondary Circuit Low

Quick Answer

The P0231 diagnostic trouble code (DTC) for a 2007 Ford Fusion indicates a problem with the Fuel Pump Secondary Circuit being low. Common causes include Faulty fuel pump, Damaged wiring or connectors in the fuel pump circuit, Malfunctioning fuel pump driver module. 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
P0231 2007 Ford Fusion indicates Fuel Pump Secondary Circuit Low.
Common causes
Common causes include Faulty fuel pump, Damaged wiring or connectors in the fuel pump circuit, Malfunctioning fuel pump driver module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P0231 2007 Ford Fusion Description

The P0231 diagnostic trouble code (DTC) for a 2007 Ford Fusion indicates a problem with the Fuel Pump Secondary Circuit being low. This means that the powertrain control module (PCM) has detected a voltage signal that is below the specified threshold for the fuel pump secondary circuit. The fuel pump secondary circuit is responsible for providing power to the fuel pump when the engine is running. A low voltage in this circuit can cause issues with fuel delivery to the engine, leading to poor performance and potential engine stalling.

OBDII Code P0231 2007 Ford Fusion - Fuel Pump Secondary Circuit Low
P0231 2007 Ford Fusion Code - Fuel Pump Secondary Circuit Low

Common Causes of P0231 2007 Ford Fusion

  1. Faulty fuel pump
  2. Damaged wiring or connectors in the fuel pump circuit
  3. Malfunctioning fuel pump driver module
  4. Issues with the PCM
  5. Poor electrical connection or ground to the fuel pump

Symptoms of P0231 2007 Ford Fusion

  1. Engine misfires or hesitation during acceleration
  2. Difficulty starting the engine
  3. Engine stalling or cutting out while driving
  4. Reduced fuel efficiency
  5. Illuminated check engine light

How to Fix P0231 2007 Ford Fusion

  1. Perform a thorough inspection of the fuel pump secondary circuit, including wiring and connectors, to check for any damage or loose connections.
  2. Test the fuel pump to determine if it is functioning properly or needs to be replaced.
  3. Check the fuel pump driver module for any faults or malfunctions and replace if necessary.
  4. Clear the diagnostic trouble codes from the PCM and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be needed to pinpoint the exact cause of the low voltage in the fuel pump secondary circuit.

Cost to Fix P0231 2007 Ford Fusion

The typical repair costs for addressing a P0231 code in a 2007 Ford Fusion can range from $200 to $500, including parts and labor. However, it is important to note that specific diagnosis time and labor rates at auto repair shops can vary depending on various factors. Rates may be higher in metropolitan areas or at dealerships, while independent shops may offer more competitive pricing. It is advisable to contact local auto repair shops for a more accurate estimate based on the specific circumstances of the vehicle.

What does this mean?

Tech Notes for P0231 2007 Ford Fusion

For some FORD models:

1. Disconnect the inertia switch harness connector

2. Turn key to ON position (Engine OFF)

3. Measure voltage of circuit between inertia switch harness connector and ground

4. If battery voltage is found, replaced Inertia Switch

5. Clear codes.

When is the Code Detected?

The code will be set if a low voltage on the control circuit of the fuel pump relay is detected by the ECM.

Need more information about the P0231 2007 Ford Fusion 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 P0231 2007 Ford Fusion Code

1. What are the common symptoms of OBDII code P0231 on a 2007 Ford Fusion?

The common symptoms include engine stalling, difficulty starting the vehicle, and a decrease in fuel efficiency.

2. What does the OBDII code P0231 on a 2007 Ford Fusion mean?

The code indicates a potential issue with the fuel pump secondary circuit being lower than expected.

3. What are the possible causes of OBDII code P0231 on a 2007 Ford Fusion?

Possible causes include a faulty fuel pump, damaged wiring or connectors in the fuel pump circuit, a blown fuse related to the fuel pump, or a problem with the fuel pump relay.

4. How can I diagnose the reason behind OBDII code P0231 on my 2007 Ford Fusion?

You can use a scan tool to check for other related codes, visually inspect the wiring and connectors for any damage, test the fuel pump relay, and perform a fuel pressure test to determine the cause of the issue.

5. Can I continue driving my 2007 Ford Fusion with OBDII code P0231?

It is not recommended to continue driving the vehicle with this code, as it can lead to further damage to the fuel system and potential safety hazards.

6. How can I repair OBDII code P0231 on a 2007 Ford Fusion?

Repair options include replacing the fuel pump if it is faulty, repairing or replacing damaged wiring or connectors, checking and replacing any blown fuses, and testing or replacing the fuel pump relay.

7. Is it possible to reset OBDII code P0231 on a 2007 Ford Fusion without making any repairs?

While clearing the code temporarily may be possible, it is essential to address the underlying issue to prevent the code from reoccurring.

8. Can a DIY enthusiast fix OBDII code P0231 on a 2007 Ford Fusion?

Depending on their skill level, a DIY enthusiast may be able to diagnose and repair this code by following a repair manual and using the appropriate tools.

9. How much does it typically cost to repair OBDII code P0231 on a 2007 Ford Fusion?

The cost of repairs can vary based on the root cause of the issue, but it may range from $200 to $800, including parts and labor.

10. Will OBDII code P0231 on a 2007 Ford Fusion affect the vehicle's performance?

Yes, this code can affect the vehicle's performance by causing engine stalling, difficulty starting, and decreased fuel efficiency due to potential issues with the fuel pump secondary circuit.

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