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Engine-Codes – Ford – P0231 2012 Ford Fusion

P0231 2012 Ford Fusion Code - Fuel Pump Secondary Circuit Low

Quick Answer

The P0231 diagnostic trouble code (DTC) for a 2012 Ford Fusion indicates a problem with the fuel pump secondary circuit being low. Common causes include Faulty wiring in the fuel pump circuit, Defective fuel pump relay, 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 2012 Ford Fusion indicates Fuel Pump Secondary Circuit Low.
Common causes
Common causes include Faulty wiring in the fuel pump circuit, Defective fuel pump relay, 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 17, 2024
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Code P0231 2012 Ford Fusion Description

The P0231 diagnostic trouble code (DTC) for a 2012 Ford Fusion indicates a problem with the fuel pump secondary circuit being low. In simpler terms, this means that the powertrain control module (PCM) has detected an issue with the electrical circuit that controls the fuel pump. The fuel pump is responsible for delivering fuel from the tank to the engine, and if the secondary circuit is not functioning properly, it can lead to a variety of performance issues.

OBDII Code P0231 2012 Ford Fusion - Fuel Pump Secondary Circuit Low
P0231 2012 Ford Fusion Code - Fuel Pump Secondary Circuit Low

Common Causes of P0231 2012 Ford Fusion

  1. Faulty wiring in the fuel pump circuit
  2. Defective fuel pump relay
  3. Malfunctioning fuel pump
  4. Issues with the powertrain control module (PCM)
  5. Poor electrical connections in the circuit

Symptoms of P0231 2012 Ford Fusion

  1. Engine misfires
  2. Rough idling
  3. Stalling
  4. Difficulty starting the vehicle
  5. Decreased engine performance

How to Fix P0231 2012 Ford Fusion

  1. Begin by inspecting the wiring and connectors in the fuel pump circuit for any signs of damage or corrosion. Repair or replace any damaged components.
  2. Test the fuel pump relay to ensure it is functioning correctly. Replace the relay if necessary.
  3. Check the fuel pump itself for proper operation. If the fuel pump is faulty, replace it with a new one.
  4. Clear the DTC from the PCM memory using a diagnostic scanner after completing the repairs.
  5. Test drive the vehicle to ensure that the issue has been resolved and that the symptoms associated with the P0231 code have been eliminated.

Cost to Fix P0231 2012 Ford Fusion

The typical repair costs for addressing a P0231 code on a 2012 Ford Fusion can vary depending on the specific cause of the issue. In general, replacing a fuel pump relay or repairing wiring may cost between $100 and $300, while replacing a fuel pump can range from $300 to $800. Labor costs at auto repair shops typically range from $80 to $150 per hour. It's advisable to check with local repair shops for a more accurate estimate based on your location and vehicle specifics.

What does this mean?

Tech Notes for P0231 2012 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.

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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 2012 Ford Fusion Code

1. What are the common symptoms of OBDII code P0231 on a 2012 Ford Fusion?

The common symptoms of OBDII code P0231 "Fuel Pump Secondary Circuit Low" on a 2012 Ford Fusion include difficulty starting the vehicle, engine stalling, and a lack of power while driving.

2. What are the possible causes of OBDII code P0231 on a 2012 Ford Fusion?

The possible causes of OBDII code P0231 on a 2012 Ford Fusion include a faulty fuel pump, issues with the fuel pump relay, damaged wiring or connectors in the fuel pump circuit, or a problem with the powertrain control module (PCM).

3. How can I diagnose the OBDII code P0231 on my 2012 Ford Fusion?

To diagnose OBDII code P0231 on a 2012 Ford Fusion, you can use an OBDII scanner to read the code and check the fuel pump relay, wiring, and connectors for any visible damage. You may also need to test the fuel pump's operation and the PCM's functionality.

4. Can I still drive my 2012 Ford Fusion with OBDII code P0231?

It is not recommended to drive your 2012 Ford Fusion with OBDII code P0231, as it can lead to engine stalling and other potential safety hazards. It is best to address the issue promptly to prevent further damage.

5. How do I repair OBDII code P0231 on my 2012 Ford Fusion?

To repair OBDII code P0231 "Fuel Pump Secondary Circuit Low" on a 2012 Ford Fusion, you may need to replace the fuel pump, repair any damaged wiring or connectors, replace the fuel pump relay, or reprogram the PCM if necessary.

6. Is it safe to reset the OBDII code P0231 on my 2012 Ford Fusion using an OBDII scanner?

While you can reset the OBDII code P0231 using an OBDII scanner, it is important to address the underlying issue causing the code to prevent it from reoccurring. Resetting the code without proper diagnosis and repair may lead to ongoing problems.

7. Can a DIY enthusiast fix OBDII code P0231 on a 2012 Ford Fusion?

Depending on your skill level and familiarity with automotive repairs, a DIY enthusiast may be able to fix OBDII code P0231 on a 2012 Ford Fusion by following repair guides and using the necessary tools. However, complex issues like a faulty fuel pump may require professional assistance.

8. How much does it cost to repair OBDII code P0231 on a 2012 Ford Fusion?

The cost to repair OBDII code P0231 on a 2012 Ford Fusion can vary depending on the underlying issue causing the code. Repairs may range from replacing a fuel pump relay (around $50-$100) to replacing the fuel pump itself (upwards of $300 or more).

9. Will OBDII code P0231 on a 2012 Ford Fusion affect fuel efficiency?

OBDII code P0231 "Fuel Pump Secondary Circuit Low" on a 2012 Ford Fusion can potentially affect fuel efficiency if the fuel pump is not functioning properly. It is important to address the issue promptly to maintain optimal fuel economy.

10. Is OBDII code P0231 a common issue in 2012 Ford Fusion vehicles?

While OBDII code P0231 "Fuel Pump Secondary Circuit Low" may not be extremely common in 2012 Ford Fusion vehicles, it can still occur due to various factors such as wear and tear on components or electrical issues.

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