AutoCodes – Ford – P1235 1997 Ford F150

P1235 1997 Ford F150 Code - Fuel Pump Control Out of Range

Quick Answer

The P1235 code indicates the Fuel Pump Drive Module (FPDM) detected an invalid or missing Fuel Pump (FP) circuit signal from the Powertrain Control Module (PCM). Common causes include Faulty Fuel Pump Drive Module (FPDM), FPDM harness is open or shorted, 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: P1235 1997 Ford F150 indicates Fuel Pump Control Out of Range.
Common causes: Common causes include Faulty Fuel Pump Drive Module (FPDM), FPDM harness is open or shorted, 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 2,790

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 P1235 1997 Ford F150 Description

The P1235 code indicates the Fuel Pump Drive Module (FPDM) detected an invalid or missing Fuel Pump (FP) circuit signal from the Powertrain Control Module (PCM). The FPDM sends a message to the PCM through the FPM circuit, indicating this failure was detected. The PCM sets the DTC when the message is received.

OBDII Code P1235 1997 Ford F150 - Fuel Pump Control Out of Range - AutoCodes.com — P1235 1997 Ford F150 Code - Fuel Pump Control Out of Range

What does this mean?

What are the Possible Causes of the DTC P1235 1997 Ford F150?

Faulty Fuel Pump Drive Module (FPDM)
FPDM harness is open or shorted
FPDM circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P1235 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.
P1235 indicates that the FPDM has detected an invalid or missing FP circuit signal from the PCM. 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 P1235 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.

Need more information about the P1235 1997 Ford F150 code?

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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 P1235 1997 Ford F150 Code

1. What does the OBDII code P1235 mean on a 1997 Ford F150?

P1235 indicates that the Fuel Pump Driver Module (FPDM) has detected a fuel pump control signal that is out of range or abnormal.

2. What are common symptoms of the P1235 code on a 1997 Ford F150?

Symptoms include engine stalling, difficulty starting, reduced power, or the engine not starting at all.

3. What causes the P1235 code to appear on a 1997 Ford F150?

The most common causes are a faulty Fuel Pump Driver Module, wiring issues such as damaged or corroded connections, or a failing fuel pump.

4. Can a bad fuel pump trigger the P1235 code?

Yes, a failing fuel pump can cause abnormal signals to the FPDM, triggering the P1235 code.

5. How do I diagnose the P1235 code on my 1997 Ford F150?

Start by checking the wiring and connectors for the FPDM and fuel pump, test the fuel pump for proper operation, and inspect the FPDM for signs of damage or failure.

6. Can I drive my 1997 Ford F150 with the P1235 code active?

Itâ€™s not recommended, as the P1235 code can lead to engine stalling or failure to start, potentially leaving you stranded.

7. What is the Fuel Pump Driver Module (FPDM) on a 1997 Ford F150?

The FPDM is a component that regulates the voltage and operation of the fuel pump based on engine needs and driving conditions.

8. How do I fix the P1235 code on a 1997 Ford F150?

Repair steps may include replacing the FPDM, repairing damaged wiring, cleaning corroded connectors, or replacing the fuel pump if it is faulty.

9. How much does it cost to repair the P1235 code on a 1997 Ford F150?

Costs can vary, but replacing the FPDM typically ranges from $100 to $300, while replacing the fuel pump can cost $500 or more, depending on parts and labor.

10. Can a bad PCM cause the P1235 code on a 1997 Ford F150?

While rare, a malfunctioning Powertrain Control Module (PCM) can sometimes misinterpret signals and trigger this code. Itâ€™s usually the last component to check.