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P1235 2003 Ford F150 Code - Fuel Pump Control Out of Range

Quick Answer

The P1235 code for a 2003 Ford F150 indicates that there is an issue with the fuel pump control being out of range. Common causes include Faulty fuel pump control module, Wiring or electrical issues in the fuel pump control circuit, Corrosion or damage to the fuel pump control module connectors. 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 2003 Ford F150 indicates Fuel Pump Control Out of Range.
Common causes
Common causes include Faulty fuel pump control module, Wiring or electrical issues in the fuel pump control circuit, Corrosion or damage to the fuel pump control module connectors.
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 17, 2024
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Code P1235 2003 Ford F150 Description

The P1235 code for a 2003 Ford F150 indicates that there is an issue with the fuel pump control being out of range. This means that the fuel pump control module is not functioning within the expected parameters, which can lead to a variety of performance issues for the vehicle. The fuel pump control module is responsible for regulating the fuel pump's operation, ensuring that the correct amount of fuel is delivered to the engine at all times. When this control module is not functioning properly, it can lead to erratic fuel delivery, poor engine performance, and potentially even engine stalling.

OBDII Code P1235 2003 Ford F150 - Fuel Pump Control Out of Range
P1235 2003 Ford F150 Code - Fuel Pump Control Out of Range

Common Causes of P1235 2003 Ford F150

  1. Faulty fuel pump control module.
  2. Wiring or electrical issues in the fuel pump control circuit.
  3. Corrosion or damage to the fuel pump control module connectors.
  4. Fuel pump relay malfunction.
  5. Issues with the fuel pump itself.

Symptoms of P1235 2003 Ford F150

  1. Engine misfires or hesitation during acceleration.
  2. Difficulty starting the engine or engine stalling.
  3. Reduced fuel efficiency.
  4. Check Engine Light illuminated on the dashboard.
  5. Rough idling or uneven engine performance.

How to Fix P1235 2003 Ford F150

  1. Begin by diagnosing the specific cause of the P1235 code using a diagnostic scanner to pinpoint the exact issue with the fuel pump control module.
  2. Inspect the wiring and connectors in the fuel pump control circuit for any signs of damage or corrosion. Repair or replace any damaged components.
  3. Test the fuel pump relay to ensure it is functioning correctly. Replace if necessary.
  4. If the fuel pump control module is found to be faulty, replace it with a new unit.
  5. Clear the diagnostic trouble codes from the vehicle's computer and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P1235 2003 Ford F150

The typical repair costs for addressing a P1235 code on a 2003 Ford F150 can vary depending on the specific cause of the issue. In general, replacing a faulty fuel pump control module can cost between $200 and $500, including parts and labor. However, additional costs may be incurred if other components such as wiring or the fuel pump relay need to be replaced. It's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your location and vehicle specifics.

What does this mean?

Tech Notes for P1235 2003 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.

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.

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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 2003 Ford F150 Code

1. What does OBDII code P1235 on a 2003 Ford F150 mean?

The code P1235 indicates that the Fuel Pump Control is out of range on a 2003 Ford F150.

2. What are the common symptoms of OBDII code P1235 on a 2003 Ford F150?

Common symptoms include engine stalling, difficulty starting the vehicle, loss of power, and the fuel pump running continuously.

3. What are the possible causes of OBDII code P1235 on a 2003 Ford F150?

Possible causes include a faulty fuel pump driver module, damaged wiring or connectors, a defective fuel pump, or issues with the fuel pump control circuit.

4. How can I diagnose the OBDII code P1235 on a 2003 Ford F150?

Diagnosis typically involves checking the fuel pump driver module, inspecting the wiring and connectors for damage, testing the fuel pump, and verifying the fuel pump control circuit's operation.

5. Can I still drive my 2003 Ford F150 with OBDII code P1235?

It is not recommended to drive the vehicle with code P1235, as it can lead to potential fuel delivery issues and cause the engine to stall unexpectedly.

6. How do I repair OBDII code P1235 on a 2003 Ford F150?

Repair options may include replacing the fuel pump driver module, repairing damaged wiring or connectors, replacing the fuel pump, or addressing issues with the fuel pump control circuit.

7. Is it safe to reset the OBDII code P1235 on a 2003 Ford F150 using a scanner?

While you can reset the code with a scanner, it is essential to address the underlying issue causing the code to prevent further problems with the fuel system.

8. Can a DIY enthusiast fix OBDII code P1235 on a 2003 Ford F150?

Depending on the level of expertise, a DIY enthusiast may be able to diagnose and repair code P1235 by following the vehicle's service manual and using the appropriate tools.

9. How much does it cost to repair OBDII code P1235 on a 2003 Ford F150?

The cost of repairing code P1235 can vary depending on the specific issue causing the code and whether the repair is done at a dealership, independent mechanic, or DIY.

10. Will OBDII code P1235 on a 2003 Ford F150 affect fuel efficiency?

Yes, code P1235 can impact fuel efficiency due to potential fuel pump control issues affecting the proper delivery of fuel to the engine.

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