AutoCodes – Ford – P1237 1997 Ford F150

P1237 1997 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 1997 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 2,938

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 1997 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 1997 Ford F150 - Fuel Pump Secondary Circuit Fault - AutoCodes.com — P1237 1997 Ford F150 Code - Fuel Pump Secondary Circuit Fault

What does this mean?

What are the Possible Causes of the DTC P1237 1997 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 1997 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 1997 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 1997 Ford F150 Code

1. What does OBDII code P1237 mean on a 1997 Ford F150?

Code P1237 indicates a Fuel Pump Secondary Circuit Fault, meaning the PCM has detected an issue in the secondary circuit of the fuel pump, such as a voltage or signal problem.

2. What are the symptoms of a P1237 code in a 1997 Ford F150?

Common symptoms include engine stalling, difficulty starting, poor acceleration, reduced fuel efficiency, or the engine not starting at all.

3. What causes the P1237 code to appear on a 1997 Ford F150?

Potential causes include a faulty fuel pump driver module, damaged wiring or connectors in the fuel pump circuit, a failing fuel pump, or a malfunctioning PCM.

4. Can I drive my 1997 Ford F150 with a P1237 code?

Itâ€™s not recommended to drive with a P1237 code, as it could lead to engine stalling or other performance issues that may leave you stranded.

5. How do I diagnose the P1237 code on my 1997 Ford F150?

Start by inspecting the wiring and connectors in the fuel pump circuit for damage or corrosion. Use a multimeter to check for proper voltage and continuity. Test the fuel pump and the fuel pump driver module.

6. How can I fix the P1237 code on my 1997 Ford F150?

Repairs may include replacing the fuel pump driver module, repairing or replacing damaged wiring, cleaning corroded connectors, or replacing the fuel pump if itâ€™s faulty.

7. What tools are needed to troubleshoot the P1237 code?

Youâ€™ll need an OBDII scanner, a multimeter, and possibly basic tools for accessing and inspecting wiring or components.

8. Could a bad fuel pump relay cause the P1237 code on a 1997 Ford F150?

Yes, a faulty fuel pump relay could cause the P1237 code by interrupting the secondary circuitâ€™s proper operation.

9. Does the P1237 code mean the fuel pump is bad on my 1997 Ford F150?

Not necessarily. While a bad fuel pump is a possibility, the issue could also stem from wiring problems, the fuel pump driver module, or the PCM.

10. Is the P1237 code specific to Ford vehicles?

While P1237 is often associated with Ford vehicles, the specific meaning and diagnosis steps can vary by manufacturer. For the 1997 Ford F150, it relates to the fuel pump secondary circuit.