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Engine-Codes – Ford – P0231 2010 Ford Fusion

P0231 2010 Ford Fusion Code - Fuel Pump Secondary Circuit Low

Quick Answer

The P0231 code on a 2010 Ford Fusion indicates a problem with the fuel pump secondary circuit being low. Common causes include Faulty fuel pump relay, Wiring issues such as damaged or corroded wires, Malfunctioning fuel pump. 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 2010 Ford Fusion indicates Fuel Pump Secondary Circuit Low.
Common causes
Common causes include Faulty fuel pump relay, Wiring issues such as damaged or corroded wires, Malfunctioning fuel pump.
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 11, 2024
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Code P0231 2010 Ford Fusion Description

The P0231 code on a 2010 Ford Fusion indicates a problem with the fuel pump secondary circuit being low. This means that the fuel pump is not receiving enough voltage to operate properly, potentially leading to issues with fuel delivery to the engine. The fuel pump is responsible for pumping fuel from the gas tank to the engine at the correct pressure for combustion. If the fuel pump secondary circuit is not functioning correctly, it can lead to poor engine performance, stalling, or even the vehicle not starting at all.

OBDII Code P0231 2010 Ford Fusion - Fuel Pump Secondary Circuit Low
P0231 2010 Ford Fusion Code - Fuel Pump Secondary Circuit Low

Common Causes of P0231 2010 Ford Fusion

  1. Faulty fuel pump relay.
  2. Wiring issues such as damaged or corroded wires.
  3. Malfunctioning fuel pump.
  4. Problems with the powertrain control module (PCM).
  5. Electrical issues such as a blown fuse.

Symptoms of P0231 2010 Ford Fusion

  1. Engine misfires or hesitation during acceleration.
  2. Rough idling or stalling.
  3. Decreased fuel efficiency.
  4. Vehicle not starting or difficulty starting.
  5. Check Engine light illuminated on the dashboard.

How to Fix P0231 2010 Ford Fusion

  1. Check the fuel pump relay for proper operation and replace if necessary.
  2. Inspect the wiring harness for any damage or corrosion and repair as needed.
  3. Test the fuel pump to ensure it is functioning correctly and replace if faulty.
  4. Check the powertrain control module (PCM) for any fault codes and address any issues found.
  5. Clear the diagnostic trouble codes and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0231 2010 Ford Fusion

The cost of repairing a P0231 code on a 2010 Ford Fusion can vary depending on the specific cause of the issue and the necessary repairs. In general, the cost of parts such as a fuel pump relay, wiring harness, fuel pump, or PCM can range from $100 to $500 or more. Labor costs for the repair can range from $150 to $500 or more, depending on the shop's hourly rate and the complexity of the repair. It's important to consult with a qualified mechanic to get an accurate estimate based on the specific diagnosis and repair needed for your vehicle.

What does this mean?

Tech Notes for P0231 2010 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 2010 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 2010 Ford Fusion Code

1. What are the common symptoms of OBDII code P0231 on a 2010 Ford Fusion?

The common symptoms include engine stalling, difficulty starting the vehicle, reduced power, and the Check Engine light turning on.

2. What does the OBDII code P0231 "Fuel Pump Secondary Circuit Low" indicate in a 2010 Ford Fusion?

This code indicates that the fuel pump secondary circuit is registering a low voltage condition, which can affect the fuel delivery system's performance.

3. What are the possible causes of OBDII code P0231 on a 2010 Ford Fusion?

Potential causes include a faulty fuel pump relay, damaged wiring or connectors in the fuel pump circuit, a failing fuel pump, or a problem with the vehicle's PCM (powertrain control module).

4. How can I diagnose the OBDII code P0231 on my 2010 Ford Fusion?

Diagnosis typically involves checking the fuel pump relay, inspecting the wiring and connectors for damage, testing the fuel pump's voltage and current draw, and scanning the PCM for any related fault codes.

5. Can I continue driving my 2010 Ford Fusion with OBDII code P0231?

It is not recommended to drive the vehicle with this code active, as it can lead to potential fuel delivery issues and engine performance problems, which may result in further damage.

6. How can I repair OBDII code P0231 on my 2010 Ford Fusion?

Repair options may include replacing the fuel pump relay, repairing or replacing damaged wiring or connectors, replacing the fuel pump if necessary, or reprogramming the PCM if a software issue is suspected.

7. Will resetting the Check Engine light resolve OBDII code P0231 on my 2010 Ford Fusion?

Simply resetting the Check Engine light will not fix the underlying issue causing the code. Proper diagnosis and repair are necessary to address the root cause of the problem.

8. Is OBDII code P0231 a common issue in 2010 Ford Fusion vehicles?

While it may not be extremely common, experiencing code P0231 in a 2010 Ford Fusion is not unheard of, especially as the vehicle ages and components wear out.

9. Can a DIY enthusiast fix OBDII code P0231 on a 2010 Ford Fusion?

Depending on their skill level and access to tools, a DIY enthusiast may be able to diagnose and repair code P0231 themselves, especially if they have experience working on automotive electrical systems.

10. How much does it typically cost to repair OBDII code P0231 on a 2010 Ford Fusion?

The cost of repair can vary depending on the specific cause of the issue and whether professional help is needed. Costs may range from replacing a relay or fuse to more extensive repairs involving the fuel pump or PCM.

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