AutoCodes – Ford – P1237 1998 Ford F150

P1237 1998 Ford F150 Code - Fuel Pump Secondary Circuit Fault

Quick Answer

Fuel Pump Driver Modules (FPDM) controls the voltage to the Fuel Pump in order to maintain proper fuel pressure over the full operating range of the engine. Common causes include Faulty Fuel Pump Driver Module (FPDM), Fuel Pump Driver Module (FPDM) harness is open or shorted, Fuel Pump Driver Module (FPDM) circuit poor electrical connection. 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 1998 Ford F150 indicates Fuel Pump Secondary Circuit Fault.
Common causes: Common causes include Faulty Fuel Pump Driver Module (FPDM), Fuel Pump Driver Module (FPDM) harness is open or shorted, Fuel Pump Driver Module (FPDM) circuit poor electrical connection.
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.

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Code Popularity 2,769

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 20, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1237 1998 Ford F150 Description

Fuel Pump Driver Modules (FPDM) controls the voltage to the Fuel Pump in order to maintain proper fuel pressure over the full operating range of the engine. The P1237 code indicates the FPDM detected a fuel pump secondary circuit concern. The FPDM sends a message to the Powertrain Control Module (PCM) through the Fuel Pump Monitor (FPM) circuit indicating this concern was detected. The PCM sets the DTC when the message is received.

OBDII Code P1237 1998 Ford F150 - Fuel Pump Secondary Circuit Fault - AutoCodes.com — P1237 1998 Ford F150 Code - Fuel Pump Secondary Circuit Fault

What does this mean?

What are the Possible Causes of the DTC P1237 1998 Ford F150?

Faulty Fuel Pump Driver Module (FPDM)
Fuel Pump Driver Module (FPDM) harness is open or shorted
Fuel Pump Driver Module (FPDM) circuit poor electrical connection
Faulty fuel pump

How to Fix the DTC P1237 1998 Ford F150?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1237 1998 Ford F150 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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 1998 Ford F150 Code

1. What are the common symptoms of OBDII code P1237 in a 1998 Ford F150?

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

2. What causes the OBDII code P1237 Fuel Pump Secondary Circuit Fault in a 1998 Ford F150?

- This code is typically triggered by issues with the fuel pump driver module, wiring faults, or a malfunctioning fuel pump.

3. How can I diagnose the Fuel Pump Secondary Circuit Fault in my 1998 Ford F150?

- You can use a scan tool to retrieve the trouble code and perform tests on the fuel pump driver module, wiring, and fuel pump to identify the root cause.

4. Is it safe to continue driving my 1998 Ford F150 with OBDII code P1237 active?

- It is not recommended to drive the vehicle with this code active as it can lead to further damage to the fuel system and potential safety hazards.

5. Can a DIY enthusiast repair the Fuel Pump Secondary Circuit Fault in a 1998 Ford F150?

- While some may attempt to repair this issue themselves, it is recommended to have a qualified mechanic diagnose and fix the problem due to the complexity of the fuel system.

6. How much does it cost to repair OBDII code P1237 in a 1998 Ford F150?

- The cost of repairing this code can vary depending on the root cause, but it typically ranges from $300 to $800 including parts and labor.

7. Are there any preventive measures to avoid triggering the Fuel Pump Secondary Circuit Fault in a 1998 Ford F150?

- Regular vehicle maintenance, including checking the fuel pump and related components, can help prevent issues that may lead to this fault code.

8. Can a faulty 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 ensure proper functioning of the fuel system.

9. Will resetting the OBDII code P1237 in a 1998 Ford F150 make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue is not fixed, the code is likely to reappear after driving the vehicle.

10. How long does it take to repair OBDII code P1237 Fuel Pump Secondary Circuit Fault in a 1998 Ford F150?

- The repair time can vary depending on the exact cause of the issue, but it typically takes a few hours to a full day for a mechanic to diagnose and fix the problem.