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P1237 2001 Ford F150 Code - Fuel Pump Secondary Circuit Fault

Quick Answer

The P1237 diagnostic trouble code (DTC) for a 2001 Ford F150 indicates a Fuel Pump Secondary Circuit Fault. Common causes include Faulty wiring or connectors in the fuel pump circuit, Malfunctioning fuel pump relay, Blown fuse related to the 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
P1237 2001 Ford F150 indicates Fuel Pump Secondary Circuit Fault.
Common causes
Common causes include Faulty wiring or connectors in the fuel pump circuit, Malfunctioning fuel pump relay, Blown fuse related to the 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 27, 2024
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Code P1237 2001 Ford F150 Description

The P1237 diagnostic trouble code (DTC) for a 2001 Ford F150 indicates a Fuel Pump Secondary Circuit Fault. This code is triggered when the powertrain control module (PCM) detects a malfunction in the secondary circuit of the fuel pump. 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 components and wiring that control the fuel pump's operation.

OBDII Code P1237 2001 Ford F150 - Fuel Pump Secondary Circuit Fault
P1237 2001 Ford F150 Code - Fuel Pump Secondary Circuit Fault

Common Causes of P1237 2001 Ford F150

  1. Faulty wiring or connectors in the fuel pump circuit
  2. Malfunctioning fuel pump relay
  3. Blown fuse related to the fuel pump
  4. Defective fuel pump
  5. Issues with the PCM or other related control modules

Symptoms of P1237 2001 Ford F150

  1. Engine stalling or hesitation
  2. Rough idling
  3. Difficulty starting the vehicle
  4. Loss of power while driving
  5. Check Engine Light illuminated on the dashboard

How to Fix P1237 2001 Ford F150

  1. Begin by conducting a visual inspection of the wiring and connectors in the fuel pump circuit to check for any signs of damage or corrosion.
  2. Test the fuel pump relay and replace it if necessary.
  3. Check and replace any blown fuses related to the fuel pump.
  4. Test the fuel pump's operation and replace it if it is found to be defective.
  5. Clear the DTC with a scan tool and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1237 2001 Ford F150

The typical repair costs for addressing a Fuel Pump Secondary Circuit Fault can vary depending on the specific cause of the issue. In general, replacing a fuel pump relay or fuse may cost between $50 to $150, while replacing a fuel pump itself can range from $300 to $800 or more, including parts and labor. It is important to note that the actual 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 is advisable to check with local repair shops for a more accurate estimate.

What does this mean?

Tech Notes for P1237 2001 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 2001 Ford F150 Code

1. What are the common symptoms of OBDII code P1237 on a 2001 Ford F150?

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

2. What causes the OBDII code P1237 on a 2001 Ford F150?

- The code is typically triggered by issues with the fuel pump secondary circuit, such as a faulty fuel pump driver module, wiring issues, or a defective fuel pump.

3. How can I diagnose the fuel pump secondary circuit fault causing OBDII code P1237 on my 2001 Ford F150?

- Diagnosing the issue involves checking the fuel pump driver module, inspecting the wiring for any damage or corrosion, and testing the fuel pump's functionality.

4. Can a bad fuel pump driver module be repaired, or does it need to be replaced?

- In most cases, a faulty fuel pump driver module will need to be replaced rather than repaired to resolve the P1237 trouble code.

5. Are there any DIY repair tips for fixing the fuel pump secondary circuit fault on a 2001 Ford F150?

- DIY repair tips include checking and securing all wiring connections, testing the fuel pump relay, and ensuring proper ground connections.

6. What are the dangers of driving with OBDII code P1237 present on a 2001 Ford F150?

- Driving with code P1237 can lead to fuel delivery issues, potentially causing the engine to stall unexpectedly, leading to unsafe driving conditions.

7. How much does it typically cost to repair the fuel pump secondary circuit fault triggering OBDII code P1237 on a 2001 Ford F150?

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

8. Can resetting the OBDII code P1237 on a 2001 Ford F150 make it go away permanently?

- Resetting the code without addressing the underlying issue will only temporarily clear the code, with the problem likely to resurface until the root cause is fixed.

9. Is it safe to continue driving my 2001 Ford F150 with the fuel pump secondary circuit fault triggering OBDII code P1237?

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

10. How long does it typically take a mechanic to diagnose and repair the fuel pump secondary circuit fault causing OBDII code P1237 on a 2001 Ford F150?

- The diagnosis and repair process can take a few hours to a full day, depending on the extent of the issue and the availability of parts.

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