Engine-Codes.com
Engine-Codes – Ford – P0231 2008 Ford Fusion

P0231 2008 Ford Fusion Code - Fuel Pump Secondary Circuit Low

Quick Answer

The P0231 code for a 2008 Ford Fusion indicates a problem with the fuel pump secondary circuit being low. Common causes include Faulty fuel pump relay, Wiring issues or shorts in the fuel pump circuit, Malfunctioning fuel pump control 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 2008 Ford Fusion indicates Fuel Pump Secondary Circuit Low.
Common causes
Common causes include Faulty fuel pump relay, Wiring issues or shorts in the fuel pump circuit, Malfunctioning fuel pump control 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 15, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0231 2008 Ford Fusion Description

The P0231 code for a 2008 Ford Fusion indicates a problem with the fuel pump secondary circuit being low. The fuel pump is a crucial component of the vehicle's fuel delivery system, responsible for pumping fuel from the gas tank to the engine. The secondary circuit refers to the electrical circuit that controls the fuel pump's operation. When this circuit is detected to be operating at a lower voltage than normal, it can lead to a variety of issues affecting the vehicle's performance.

OBDII Code P0231 2008 Ford Fusion - Fuel Pump Secondary Circuit Low
P0231 2008 Ford Fusion Code - Fuel Pump Secondary Circuit Low

Common Causes of P0231 2008 Ford Fusion

  1. Faulty fuel pump relay
  2. Wiring issues or shorts in the fuel pump circuit
  3. Malfunctioning fuel pump control module
  4. A defective fuel pump
  5. Electrical issues in the fuel pump secondary circuit

Symptoms of P0231 2008 Ford Fusion

  1. Check Engine Light illuminated on the dashboard
  2. Difficulty starting the vehicle
  3. Rough idling or stalling
  4. Hesitation during acceleration
  5. Decreased fuel efficiency

How to Fix P0231 2008 Ford Fusion

  1. Begin by diagnosing the exact cause of the P0231 code using a diagnostic scanner to pinpoint the issue.
  2. Inspect the fuel pump relay, wiring, and connections for any signs of damage or corrosion. Replace or repair as necessary.
  3. Test the fuel pump control module for proper operation and replace if faulty.
  4. Check the fuel pump itself for any malfunctions and replace if needed.
  5. Clear the trouble codes, reset the Check Engine Light, and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0231 2008 Ford Fusion

The typical repair costs for addressing a P0231 code on a 2008 Ford Fusion can range from $200 to $600, including parts and labor. However, specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.

What does this mean?

Tech Notes for P0231 2008 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 2008 Ford Fusion code?

Need more information on how to fix the P0231 2008 Ford Fusion code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0231 2008 Ford Fusion code diagnosed by a professional: Find a repair shop in your area

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 2008 Ford Fusion Code

1. What are the common symptoms of OBDII code P0231 on a 2008 Ford Fusion?

- Common symptoms include stalling, rough idling, loss of power, and difficulty starting the vehicle.

2. What does the OBDII code P0231 "Fuel Pump Secondary Circuit Low" mean on a 2008 Ford Fusion?

- This code indicates that the fuel pump secondary circuit is experiencing low voltage, which can lead to fuel delivery issues.

3. What are the possible causes of OBDII code P0231 on a 2008 Ford Fusion?

- Possible causes include a faulty fuel pump, damaged wiring or connectors, a blown fuse, or a malfunctioning fuel pump relay.

4. How can I diagnose the issue causing OBDII code P0231 on my 2008 Ford Fusion?

- You can use a multimeter to test the voltage at the fuel pump, check the wiring and connectors for damage, inspect the fuel pump relay, and verify the integrity of the fuse.

5. What are some repair tips for fixing OBDII code P0231 on a 2008 Ford Fusion?

- Repair tips include replacing a faulty fuel pump, repairing or replacing damaged wiring or connectors, checking and replacing the fuel pump relay, and ensuring the fuse is in good condition.

6. Can driving with OBDII code P0231 on a 2008 Ford Fusion cause further damage?

- Driving with this code can potentially damage the fuel pump or lead to poor engine performance, so it's best to address the issue promptly.

7. Is it safe to continue driving my 2008 Ford Fusion with OBDII code P0231 present?

- It is not recommended to continue driving with this code active, as it could result in fuel delivery problems and potential breakdowns.

8. How much does it typically cost to repair OBDII code P0231 on a 2008 Ford Fusion?

- The cost of repairs can vary depending on the specific issue, but it may range from $200 to $600, including parts and labor.

9. Can I reset the OBDII code P0231 on my 2008 Ford Fusion myself?

- You can clear the code using an OBDII scanner, but it's crucial to address the underlying issue causing the code to prevent it from reoccurring.

10. Are there any recalls or technical service bulletins related to OBDII code P0231 on a 2008 Ford Fusion?

- It's advisable to check with Ford or consult online resources for any relevant recalls or technical service bulletins related to this specific issue.

Discuss the causes and fixes for P0231 2008 Ford Fusion OBDII Code

Submit a New Comment

Code P0231 2008 Ford Fusion comments

No comments found for this page.