AutoCodes – Ford – P1235 1998 Ford F150

P1235 1998 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 1998 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,934

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1235 1998 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 1998 Ford F150 - Fuel Pump Control Out of Range - AutoCodes.com — P1235 1998 Ford F150 Code - Fuel Pump Control Out of Range

What does this mean?

What are the Possible Causes of the DTC P1235 1998 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 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.
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 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.

Need more information about the P1235 1998 Ford F150 code?

Need more information on how to fix the P1235 1998 Ford F150 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1235 1998 Ford F150 code diagnosed by a professional: Find a repair shop in your area

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 1998 Ford F150 Code

1. What does the OBDII code P1235 mean on a 1998 Ford F150?

P1235 indicates a "Fuel Pump Control Out of Range" issue, meaning thereâ€™s a problem with the fuel pump driver module or its circuit.

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

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

3. What causes the P1235 code to appear on a 1998 Ford F150?

Causes may include a faulty fuel pump driver module, damaged wiring or connections, a failing fuel pump, or a malfunctioning powertrain control module (PCM).

4. How can I diagnose the P1235 code on my Ford F150?

Start by inspecting the fuel pump driver module and its wiring for damage, corrosion, or loose connections. Use a multimeter to check for proper voltage and consult a service manual for specific test procedures.

5. Can a faulty fuel pump trigger the P1235 code?

Yes, a failing fuel pump can cause the fuel pump control system to go out of range, leading to the P1235 code.

6. Is the P1235 code specific to the fuel pump driver module?

Not always. While the fuel pump driver module is a common culprit, the issue could also stem from wiring faults, a failing fuel pump, or problems with the PCM.

7. How do I fix the P1235 code on a 1998 Ford F150?

Repairs may include replacing the fuel pump driver module, repairing damaged wiring, replacing the fuel pump, or reprogramming or replacing the PCM if necessary.

8. Can I still drive my 1998 Ford F150 with a P1235 code?

Itâ€™s not recommended, as the code may indicate a fuel delivery issue that could lead to engine stalling or failure to start, potentially leaving you stranded.

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

Repair costs vary depending on the issue. Replacing the fuel pump driver module typically costs $100-$300 for parts and labor, while a fuel pump replacement could cost $400-$800.

10. Do I need a professional mechanic to fix the P1235 code?

If youâ€™re comfortable with basic electrical diagnostics and repairs, you can attempt to fix it yourself. However, if the issue requires advanced testing or PCM reprogramming, consulting a professional is recommended.