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P1237 2012 Ford Fusion Code - Fuel Pump Secondary Circuit Fault

Quick Answer

The P1237 diagnostic trouble code (DTC) for a 2012 Ford Fusion indicates a Fuel Pump Secondary Circuit Fault. Common causes include Faulty fuel pump, Damaged wiring or connectors in the fuel pump secondary circuit, Malfunctioning fuel pump relay. 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
P1237 2012 Ford Fusion indicates Fuel Pump Secondary Circuit Fault.
Common causes
Common causes include Faulty fuel pump, Damaged wiring or connectors in the fuel pump secondary circuit, Malfunctioning fuel pump relay.
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 14, 2024
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Code P1237 2012 Ford Fusion Description

The P1237 diagnostic trouble code (DTC) for a 2012 Ford Fusion indicates a Fuel Pump Secondary Circuit Fault. This code is specifically related to the fuel pump secondary circuit within the vehicle's fuel system. The fuel pump is responsible for supplying fuel from the tank to the engine, ensuring proper combustion and performance. The secondary circuit refers to the electrical components and wiring associated with the fuel pump.

OBDII Code P1237 2012 Ford Fusion - Fuel Pump Secondary Circuit Fault
P1237 2012 Ford Fusion Code - Fuel Pump Secondary Circuit Fault

Common Causes of P1237 2012 Ford Fusion

  1. Faulty fuel pump
  2. Damaged wiring or connectors in the fuel pump secondary circuit
  3. Malfunctioning fuel pump relay
  4. Issues with the Engine Control Module (ECM)
  5. Electrical issues such as a blown fuse or short circuit

Symptoms of P1237 2012 Ford Fusion

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

How to Fix P1237 2012 Ford Fusion

  1. Begin by conducting a thorough inspection of the fuel pump secondary circuit, checking for any visible damage to wiring or connectors.
  2. Test the fuel pump relay and replace if necessary.
  3. Use a multimeter to check the continuity of the wiring in the secondary circuit and repair any damaged wires.
  4. Test the fuel pump itself to ensure it is functioning properly, replacing it if needed.
  5. Clear the DTC from the ECM memory and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P1237 2012 Ford Fusion

The typical repair costs for addressing a Fuel Pump Secondary Circuit Fault can vary depending on the specific cause of the issue and the extent of the repairs needed. In general, the cost of replacing a fuel pump can range from $300 to $800, while addressing wiring or relay issues may cost between $100 and $300. Labor costs can add an additional $100 to $300 to the total repair bill. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to obtain a specific estimate based on your location and vehicle details.

When is the Code Detected?

Fuel pump driver module has detected a fault in the fuel pump secondary circuit

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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 P1237 2012 Ford Fusion Code

1. What are the common symptoms of OBDII code P1237 in a 2012 Ford Fusion?

The common symptoms of code P1237 in a 2012 Ford Fusion include engine stalling, rough idling, lack of power, and difficulty starting the vehicle.

2. What does the OBDII code P1237 in a 2012 Ford Fusion indicate?

Code P1237 on a 2012 Ford Fusion indicates a Fuel Pump Secondary Circuit Fault, typically pointing to issues with the fuel pump control module or wiring.

3. What are the possible causes of OBDII code P1237 in a 2012 Ford Fusion?

Possible causes of code P1237 in a 2012 Ford Fusion include a faulty fuel pump control module, damaged wiring or connectors, a defective fuel pump, or issues with the fuel pump relay.

4. How can I diagnose the Fuel Pump Secondary Circuit Fault in a 2012 Ford Fusion?

Diagnosing the Fuel Pump Secondary Circuit Fault in a 2012 Ford Fusion involves checking the fuel pump control module, inspecting the wiring and connectors for damage, testing the fuel pump relay, and ensuring the fuel pump is functioning properly.

5. Can a DIY enthusiast repair the Fuel Pump Secondary Circuit Fault related to OBDII code P1237 in a 2012 Ford Fusion?

While some DIY enthusiasts may be able to address the issue by replacing the fuel pump control module or checking and repairing wiring connections, it is recommended to consult a professional mechanic for an accurate diagnosis and proper repair.

6. Is it safe to continue driving a 2012 Ford Fusion with OBDII code P1237 indicating a Fuel Pump Secondary Circuit Fault?

It is not recommended to drive a 2012 Ford Fusion with code P1237 indicating a Fuel Pump Secondary Circuit Fault, as it can lead to engine performance issues and potential safety hazards. It is best to address the problem promptly.

7. How much does it typically cost to repair OBDII code P1237 related to a Fuel Pump Secondary Circuit Fault in a 2012 Ford Fusion?

The cost of repairing code P1237 in a 2012 Ford Fusion can vary depending on the specific issue, parts needed, and labor rates. It is advisable to obtain quotes from reputable repair shops for an accurate estimate.

8. Will resetting the OBDII code P1237 in a 2012 Ford Fusion make the issue go away?

Resetting the OBDII code P1237 may temporarily clear the fault code, but it will not fix the underlying issue causing the Fuel Pump Secondary Circuit Fault. It is essential to diagnose and repair the root cause of the problem.

9. How urgent is it to address OBDII code P1237 in a 2012 Ford Fusion?

It is advisable to address code P1237 in a 2012 Ford Fusion promptly to prevent potential engine performance issues, stalling, or other safety concerns associated with a Fuel Pump Secondary Circuit Fault.

10. Can a faulty fuel pump cause OBDII code P1237 in a 2012 Ford Fusion?

Yes, a faulty fuel pump can cause OBDII code P1237 in a 2012 Ford Fusion, as it may impact the fuel pump secondary circuit's operation and trigger the fault code.

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