AutoCodes – Ford – P120F Ford

P120F Ford Code - Fuel Pressure Regulator Excessive Pressure Variation

Quick Answer

The Powertrain Control Module (PCM) monitors the Fuel Pressure Sensor Circuit 'A'. Common causes include Faulty Fuel Pressure Sensor Circuit 'A', Fuel Pressure Sensor Circuit 'A' harness is open or shorted, Fuel Pressure Sensor Circuit 'A' 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
P120F Ford indicates Fuel Pressure Regulator Excessive Pressure Variation.
Common causes
Common causes include Faulty Fuel Pressure Sensor Circuit 'A', Fuel Pressure Sensor Circuit 'A' harness is open or shorted, Fuel Pressure Sensor Circuit 'A' 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 10,424
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 02, 2019
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Code P120F Ford Description

The Powertrain Control Module (PCM) monitors the Fuel Pressure Sensor Circuit 'A'. The PCM sets the OBDII code when the Fuel Pressure Sensor Circuit 'A' is not to factory specifications.
OBDII Code P120F Ford - Fuel Pressure Regulator Excessive Pressure Variation - AutoCodes.com
P120F Ford Code - Fuel Pressure Regulator Excessive Pressure Variation

What are the Possible Causes of the DTC P120F Ford?

  • Faulty Fuel Pressure Sensor Circuit 'A'
  • Fuel Pressure Sensor Circuit 'A' harness is open or shorted
  • Fuel Pressure Sensor Circuit 'A' circuit poor electrical connection

How to Fix the DTC P120F Ford?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P120F Ford 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 P120F Ford code?

Need more information on how to fix the P120F Ford code? Get Access to Factory Service Manuals

Need Help with the 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 P120F Ford Code

1. What are the common symptoms of OBDII code P120F (Ford) related to Fuel Pressure Regulator Excessive Pressure Variation?

The common symptoms include rough idling, loss of power, engine stalling, and potential fuel leaks.

2. What are the possible causes of OBDII code P120F (Ford) indicating Fuel Pressure Regulator Excessive Pressure Variation?

Possible causes may include a faulty fuel pressure regulator, clogged fuel filter, fuel pump issues, or problems with the fuel pressure sensor.

3. How serious is OBDII code P120F (Ford) and should I address it immediately?

This code should be addressed promptly as it can lead to poor engine performance, decreased fuel efficiency, and potential damage to engine components.

4. Can I continue driving with OBDII code P120F (Ford) present?

It is not recommended to continue driving with this code active, as it could result in further damage to the engine and potentially unsafe driving conditions.

5. How can I diagnose OBDII code P120F (Ford) related to Fuel Pressure Regulator Excessive Pressure Variation?

Diagnosis typically involves using a scan tool to read the code, conducting a visual inspection of fuel system components, and performing fuel pressure tests.

6. What are some repair tips for fixing OBDII code P120F (Ford)?

Repair tips may include replacing the fuel pressure regulator, cleaning or replacing the fuel filter, inspecting the fuel pump for proper operation, and checking for any fuel leaks.

7. Is it possible to reset OBDII code P120F (Ford) without repairing the issue?

While you can clear the code temporarily, it is essential to address the underlying problem causing the code to prevent further issues.

8. How much does it typically cost to repair OBDII code P120F (Ford) related to Fuel Pressure Regulator Excessive Pressure Variation?

The cost of repair can vary depending on the specific issue, but it may range from $200 to $500 or more, including parts and labor.

9. Can a DIY enthusiast fix OBDII code P120F (Ford) themselves?

While some experienced DIY enthusiasts may be able to diagnose and fix this code, it is recommended to consult a professional mechanic due to the complexity of the fuel system.

10. How can I prevent OBDII code P120F (Ford) from recurring in the future?

Regular maintenance of the fuel system, including changing the fuel filter at recommended intervals, can help prevent issues leading to this code.

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