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Engine-Codes – Ford – P0174 Ford

P0174 Ford Code - Fuel Injection System Too Lean Bank 2

Quick Answer

The P0174 code for Ford vehicles indicates that the fuel injection system on bank 2 is running too lean. Common causes include Vacuum leaks, Faulty oxygen sensors, Dirty or clogged fuel injectors. 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
P0174 Ford indicates Fuel Injection System Too Lean Bank 2.
Common causes
Common causes include Vacuum leaks, Faulty oxygen sensors, Dirty or clogged fuel injectors.
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 Aug 19, 2024
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Code P0174 Ford Description

The P0174 code for Ford vehicles indicates that the fuel injection system on bank 2 is running too lean. This means that there is an imbalance in the air-fuel mixture being delivered to the engine, with not enough fuel being supplied in relation to the amount of air. This can result in a variety of performance issues, including poor acceleration, rough idling, and decreased fuel efficiency. If left unaddressed, it can also lead to potential damage to the engine over time.

OBDII Code P0174 Ford - Fuel Injection System Too Lean Bank 2
P0174 Ford Code - Fuel Injection System Too Lean Bank 2

Common Causes of P0174 Ford

  1. Vacuum leaks
  2. Faulty oxygen sensors
  3. Dirty or clogged fuel injectors
  4. Fuel pump malfunction
  5. Exhaust leaks before the oxygen sensor

Symptoms of P0174 Ford

  1. Decreased fuel efficiency
  2. Rough idling or stalling
  3. Engine misfires
  4. Check engine light illuminated
  5. Lack of power or hesitation during acceleration

How to Fix P0174 Ford

  1. Perform a thorough inspection of the intake system and vacuum lines to check for leaks.
  2. Test and replace any faulty oxygen sensors.
  3. Clean or replace clogged fuel injectors.
  4. Test the fuel pump pressure and replace if necessary.
  5. Check for and repair any exhaust leaks before the oxygen sensor.

Cost to Fix P0174 Ford

The cost of repairing a P0174 code on a Ford vehicle can vary depending on the specific cause of the issue. On average, you can expect to pay between $200 and $500 for parts and labor. However, this cost can increase if additional components need to be replaced or if the diagnosis process is more time-consuming. It's recommended to consult with a trusted mechanic or dealership for a more accurate estimate based on your vehicle's make and model.

What does this mean?

Tech Notes for P0174 Ford

If the P0174 is combined with the P0171 code, the problem is likely caused by an intake leak or the Intake Plenum Gasket and seals. If there are no intake leaks, the next step is to replace the air filter and clean the airflow meter. If the problem persists, the front oxygen (O2) sensor may need to be replaced.

Link to a website with information on how to replace the Intake Plenum Gasket and seals:
1999-2003 Fords Windstar Code P0174

There is Factory Service Bulletin for the following Ford Models:
2009-2010 Ford F-150
2009-2011 Ford E-150
2009-2011 Ford E-250
2009-2011 Ford E-350
2009-2011 Ford E-450
2009-2011 Ford Expedition
2011 Ford F-250
2011 Ford F-35
Ford Factory Service Bulletin OBDII Code P0174


2004 FORD F150 P0171, P0174, P0301, Misfire, and Lean Condition











User Submitted Video

When is the Code Detected?

- Fuel injection system does not operate properly.
- The amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)

Need more information about the P0174 Ford code?

Need more information on how to fix the P0174 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Ford Models

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 P0174 Ford Code

1. What are the common symptoms of OBDII code P0174 Ford (Fuel Injection System Too Lean Bank 2)?

- Common symptoms include rough idling, poor acceleration, hesitation when driving, and potential stalling.

2. What can cause OBDII code P0174 Ford to trigger?

- Possible causes of this code include a vacuum leak, faulty oxygen sensor, clogged fuel filter, or a malfunctioning fuel injector.

3. How can I diagnose the issue causing OBDII code P0174 Ford?

- Diagnose the problem by checking for vacuum leaks, testing the oxygen sensor, inspecting the fuel filter, and verifying the fuel injector operation.

4. Can a dirty or faulty mass airflow sensor trigger OBDII code P0174 Ford?

- Yes, a dirty or faulty mass airflow sensor can cause the engine to run lean and trigger the P0174 code.

5. What are the repair tips for fixing OBDII code P0174 Ford?

- Repair tips may include cleaning or replacing the mass airflow sensor, fixing any vacuum leaks, replacing the oxygen sensor, or cleaning/replacing the fuel filter.

6. Is it safe to continue driving with OBDII code P0174 Ford active?

- It is not recommended to drive with this code active as it can lead to poor engine performance and potential damage to the vehicle over time.

7. Can a failing fuel pump cause OBDII code P0174 Ford to appear?

- Yes, a failing fuel pump can result in insufficient fuel delivery, leading to a lean condition and triggering the P0174 code.

8. Will resetting the OBDII code P0174 Ford make the problem go away?

- Resetting the code may temporarily turn off the check engine light, but it will not fix the underlying issue causing the lean condition on Bank 2.

9. How important is it to address OBDII code P0174 Ford promptly?

- It is crucial to address this code promptly to prevent further engine damage, ensure optimal fuel efficiency, and maintain overall vehicle performance.

10. Can a faulty catalytic converter be a reason for OBDII code P0174 Ford to be activated?

- A faulty catalytic converter can potentially cause the engine to run lean and trigger the P0174 code, especially if left unresolved for an extended period.

Discuss the causes and fixes for P0174 Ford OBDII Code

Submit a New Comment

  • I did all that on the 97 windstar and still got the code and sacks as if its going to die what could it be PCM?

    Reply to Comment

  • What exactly is "All" did you check for intake leaks or replaced the intake gasket as recommended on the "Tech Notes"?

    Reply to Comment

  • I have the same code on a 05 ford taurus and idk what the hell it is me and the dad tried everything

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  • have a ford explorer xlt 1996 the problem is the code p0174 y replace the intake gasket mfl and i replace the sparks and cables thermostat and sensor temp oxygen heaterd sensor and EGR AND CLEAN THE MAF SENSOR / IAC AND STILL HAVE THE PROBLEM IDLE

    Reply to Comment

  • Try replacing the fuel filter, for your car most of the times the problem is the fuel filter. Filter gets clogged and not enough fuel get to the engine. If the problem persists you may have to replace the Mass Air Flow (MAF) sensor.

    Reply to Comment