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P1237 2000 Ford F150 Code - Fuel Pump Secondary Circuit Fault

Quick Answer

The P1237 code for a 2000 Ford F150 indicates a Fuel Pump Secondary Circuit Fault. Common causes include Faulty fuel pump relay or fuse, Wiring issues or corrosion in the fuel pump circuit, Defective fuel pump control module. 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 2000 Ford F150 indicates Fuel Pump Secondary Circuit Fault.
Common causes
Common causes include Faulty fuel pump relay or fuse, Wiring issues or corrosion in the fuel pump circuit, Defective fuel pump control module.
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 12, 2024
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Code P1237 2000 Ford F150 Description

The P1237 code for a 2000 Ford F150 indicates a Fuel Pump Secondary Circuit Fault. This means that there is an issue with the secondary circuit of the fuel pump, which is responsible for delivering fuel from the tank to the engine. The fuel pump secondary circuit is crucial for maintaining the proper fuel pressure needed for the engine to run efficiently. When this circuit malfunctions, it can lead to a variety of performance issues and potentially cause long-term damage if not addressed promptly.

OBDII Code P1237 2000 Ford F150 - Fuel Pump Secondary Circuit Fault
P1237 2000 Ford F150 Code - Fuel Pump Secondary Circuit Fault

Common Causes of P1237 2000 Ford F150

  1. Faulty fuel pump relay or fuse.
  2. Wiring issues or corrosion in the fuel pump circuit.
  3. Defective fuel pump control module.
  4. Fuel pump failure or clogged fuel filter.
  5. Issues with the fuel pump itself, such as a weak motor or damaged components.

Symptoms of P1237 2000 Ford F150

  1. Check Engine Light is illuminated on the dashboard.
  2. Engine misfires or hesitates during acceleration.
  3. Difficulty starting the vehicle, especially after it has been sitting for a while.
  4. Reduced fuel efficiency or sudden drops in fuel pressure.
  5. Engine stalls or shuts off unexpectedly while driving.

How to Fix P1237 2000 Ford F150

  1. Begin by diagnosing the specific cause of the P1237 code using a diagnostic scanner to pinpoint the issue within the fuel pump secondary circuit.
  2. Check the fuel pump relay and fuse for any signs of damage or wear, replacing them if necessary.
  3. Inspect the wiring and connectors in the fuel pump circuit for corrosion or loose connections, repairing or replacing any damaged components.
  4. Test the fuel pump control module and fuel pump itself to determine if they are functioning correctly, replacing them if needed.
  5. Clean or replace the fuel filter to ensure proper fuel flow to the engine.

Cost to Fix P1237 2000 Ford F150

The typical repair costs for a Fuel Pump Secondary Circuit Fault can range from $200 to $600, including parts and labor. However, the specific 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 recommended to check local rates for a more accurate estimate before proceeding with the repair.

What does this mean?

Tech Notes for P1237 2000 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 2000 Ford F150 Code

1. What are the common symptoms of OBDII code P1237 (2000 Ford F150 - Fuel Pump Secondary Circuit Fault)?

- Common symptoms include a no-start condition, engine stalling, rough idling, and loss of power while driving.

2. What are the possible causes of OBDII code P1237 on a 2000 Ford F150?

- The primary causes of this code are a faulty fuel pump driver module, damaged wiring or connectors, or a defective fuel pump.

3. How can I diagnose the Fuel Pump Secondary Circuit Fault on my 2000 Ford F150?

- To diagnose this issue, you can perform a visual inspection of the wiring and connectors, test the fuel pump driver module, and check the fuel pump operation.

4. Can a clogged fuel filter trigger the P1237 code on a 2000 Ford F150?

- While a clogged fuel filter can contribute to fuel pump issues, it is not a direct cause of the P1237 code. It is recommended to inspect and replace the fuel filter as part of the diagnosis.

5. Is it safe to continue driving my 2000 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 pump failure, resulting in a breakdown or unsafe driving conditions.

6. How much does it typically cost to repair the Fuel Pump Secondary Circuit Fault on a 2000 Ford F150?

- The cost of repair can vary depending on the specific cause of the issue, but it generally ranges from $200 to $600 for parts and labor.

7. Can I reset the OBDII code P1237 on my 2000 Ford F150 by disconnecting the battery?

- While disconnecting the battery may temporarily clear the code, it is essential to address the underlying issue causing the fault code to prevent it from reoccurring.

8. Are there any preventive measures I can take to avoid the Fuel Pump Secondary Circuit Fault on my 2000 Ford F150?

- Regularly inspecting and maintaining the fuel pump system, including checking the fuel pump driver module and wiring, can help prevent issues that trigger the P1237 code.

9. Can a DIY enthusiast with basic mechanical skills repair the Fuel Pump Secondary Circuit Fault on a 2000 Ford F150?

- Depending on the specific cause of the issue, some DIY enthusiasts may be able to address the problem. However, it is recommended to consult a professional mechanic for an accurate diagnosis and proper repair.

10. Will replacing the fuel pump driver module resolve the P1237 code on a 2000 Ford F150?

- In many cases, replacing the fuel pump driver module can rectify the Fuel Pump Secondary Circuit Fault (P1237) on a 2000 Ford F150, but it is important to verify the diagnosis before proceeding with the repair.

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