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P1237 2002 Ford F150 Code - Fuel Pump Secondary Circuit Fault

Quick Answer

The diagnostic trouble code P1237 for a 2002 Ford F150 indicates a Fuel Pump Secondary Circuit Fault. Common causes include Faulty fuel pump relay, Damaged fuel pump driver module, Wiring issues in the fuel pump circuit. 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 2002 Ford F150 indicates Fuel Pump Secondary Circuit Fault.
Common causes
Common causes include Faulty fuel pump relay, Damaged fuel pump driver module, Wiring issues in the fuel pump circuit.
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 10, 2024
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Code P1237 2002 Ford F150 Description

The diagnostic trouble code P1237 for a 2002 Ford F150 indicates a Fuel Pump Secondary Circuit Fault. This code is related to the secondary circuit of the fuel pump, which is responsible for providing power to the fuel pump to deliver fuel from the tank to the engine. When this circuit fails, it can lead to issues with fuel delivery, potentially causing the vehicle to stall, hesitate, or have difficulty starting.

OBDII Code P1237 2002 Ford F150 - Fuel Pump Secondary Circuit Fault
P1237 2002 Ford F150 Code - Fuel Pump Secondary Circuit Fault

Common Causes of P1237 2002 Ford F150

  1. Faulty fuel pump relay
  2. Damaged fuel pump driver module
  3. Wiring issues in the fuel pump circuit
  4. Failed fuel pump

Symptoms of P1237 2002 Ford F150

  1. Engine stalling or hesitation
  2. Difficulty starting the vehicle
  3. Loss of power while driving
  4. Engine misfires
  5. Illumination of the check engine light

How to Fix P1237 2002 Ford F150

  1. Diagnose the specific cause of the fault using a diagnostic scanner to read the trouble codes and perform electrical testing to identify the faulty component.
  2. Replace the faulty fuel pump relay or fuel pump driver module if either of these components is determined to be the cause of the issue.
  3. Repair any damaged wiring in the fuel pump circuit and ensure all connections are secure.
  4. If the fuel pump is found to be faulty, replace the fuel pump with a new one to restore proper fuel delivery.

Cost to Fix P1237 2002 Ford F150

The typical repair costs for a fuel pump secondary circuit fault can vary depending on the specific cause of the issue and the cost of parts and labor. On average, the cost of replacing a fuel pump relay or fuel pump driver module can range from $100 to $300, while replacing the fuel pump itself can cost between $300 and $800. Additional costs for diagnostic testing and labor can further increase the total repair bill. It's important to keep in mind that labor rates at auto repair shops can vary, so it's advisable to check local rates for a more precise estimate.

What does this mean?

Tech Notes for P1237 2002 Ford F150

Note: For LS6/LS8 and Thunderbird, the FPDM functions are incorporated in the Rear Electronics Module (REM). Also, the REM does not use an FPM circuit. Diagnostic information is sent on the communication link.

P1237 indicates that the FPDM has detected a fuel pump secondary circuit fault. The FPDM will send a message to the PCM through the FPM circuit, indicating that this failure has been detected. The PCM will set the DTC when the message is received.

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 2002 Ford F150 Code

1. What are the common symptoms of OBDII code P1237 in a 2002 Ford F150?

- Common symptoms may include engine stalling, difficulty starting the vehicle, and a loss of power while driving.

2. What does the OBDII code P1237 on a 2002 Ford F150 indicate?

- The code P1237 points to a Fuel Pump Secondary Circuit Fault in the vehicle's system.

3. What are some possible causes of the P1237 code in a 2002 Ford F150?

- Potential causes may include a faulty fuel pump driver module, wiring issues, a defective fuel pump, or a problem with the fuel pump relay.

4. How can I diagnose the Fuel Pump Secondary Circuit Fault in my 2002 Ford F150?

- Diagnosis typically involves checking the fuel pump driver module, inspecting the wiring for any damage, testing the fuel pump, and verifying the operation of the fuel pump relay.

5. Is it safe to continue driving my 2002 Ford F150 with the P1237 code present?

- It is not recommended to drive the vehicle with the P1237 code, as it can lead to potential fuel delivery issues and engine performance problems.

6. Can I repair the Fuel Pump Secondary Circuit Fault in my 2002 Ford F150 myself?

- Depending on your skill level, you may be able to repair the issue yourself by addressing the specific cause of the fault, such as replacing the fuel pump driver module or fixing any wiring issues.

7. How much does it typically cost to repair the P1237 code in a 2002 Ford F150?

- The cost of repair can vary depending on the exact cause of the fault, but it may range from $200 to $800, including parts and labor.

8. Are there any preventative measures I can take to avoid the P1237 code in my 2002 Ford F150?

- Regularly maintaining your vehicle, including checking the fuel pump system and related components, can help prevent issues that could trigger the P1237 code.

9. How urgent is it to address the Fuel Pump Secondary Circuit Fault in my 2002 Ford F150?

- It is recommended to address the issue promptly to prevent potential fuel system failures and ensure the proper operation of your vehicle.

10. Can a mechanic use a scan tool to reset the OBDII code P1237 in my 2002 Ford F150?

- Resetting the code with a scan tool may temporarily clear the warning light, but it is crucial to diagnose and fix the underlying issue causing the P1237 code for a permanent solution.

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