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P1239 Ford Code - Speed Fuel Pump Positive Feed Fault

Quick Answer

The P1239 Ford diagnostic trouble code (DTC) specifically refers to a Speed Fuel Pump Positive Feed Fault. Common causes include Faulty fuel pump relay, Damaged or corroded wiring connections, Malfunctioning fuel pump driver module. 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
P1239 Ford indicates Speed Fuel Pump Positive Feed Fault.
Common causes
Common causes include Faulty fuel pump relay, Damaged or corroded wiring connections, Malfunctioning fuel pump driver module.
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 10, 2024
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Code P1239 Ford Description

The P1239 Ford diagnostic trouble code (DTC) specifically refers to a Speed Fuel Pump Positive Feed Fault. In simpler terms, this code indicates that there is an issue with the positive feed to the fuel pump in the vehicle. The fuel pump plays a crucial role in supplying the engine with the necessary fuel to run efficiently. If the positive feed to the fuel pump is compromised, it can lead to a variety of performance issues and potential long-term damage if left unresolved.

OBDII Code P1239 Ford - Speed Fuel Pump Positive Feed Fault
P1239 Ford Code - Speed Fuel Pump Positive Feed Fault

Common Causes of P1239 Ford

  1. Faulty fuel pump relay
  2. Damaged or corroded wiring connections
  3. Malfunctioning fuel pump driver module
  4. Defective fuel pump

Symptoms of P1239 Ford

  1. Engine stalling or hesitation
  2. Rough idling or surging
  3. Poor acceleration
  4. Engine misfires
  5. Check engine light illuminated

How to Fix P1239 Ford

  1. Begin by using a diagnostic scanner to read the trouble codes and identify the specific issue related to the Speed Fuel Pump Positive Feed Fault.
  2. Inspect the wiring harness, connectors, and components associated with the fuel pump circuit for any signs of damage or corrosion.
  3. Test the fuel pump relay and replace it if necessary.
  4. Check the fuel pump driver module for proper functioning and replace if faulty.
  5. If the fuel pump itself is determined to be the issue, replace it with a new unit.

Cost to Fix P1239 Ford

The cost of repairing a Speed Fuel Pump Positive Feed Fault can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay anywhere from $200 to $500 for parts and labor. It's important to note that diagnostic time and labor rates can vary, so it's best to check with local auto repair shops for a more precise estimate.

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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.

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