FAULTBASE
NEWSASKCars
© 2025 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
Home/Cars/Ford/F-150/12th Generation (2009-2014)/how can I fix a P0174 code on my Ford F-150 12th Generation (2009-2014)?

how can I fix a P0174 code on my Ford F-150 12th Generation (2009-2014)?

Ford F-150 12th Generation (2009-2014)

Severity: mediumDifficulty: mediumError Code: P01742-4 hours
3 min read
585 words

Problem Statement

Learn how to diagnose and fix P0174 lean condition in Ford F-150 12th Generation. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0174
Component
Engine
Repair Time
2-4 hours

Safety Warnings

  • ⚠Disconnect the battery before working on electrical components.
  • ⚠Allow the engine to cool before working on any parts to prevent burns.

Symptoms

  • •Check engine light illuminated
  • •Rough idle or stalling
  • •Decreased engine power
  • •Poor fuel economy
  • •Increased emissions
  • •Engine hesitation during acceleration

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to confirm the P0174 code.
  2. 2Inspect the air intake system for vacuum leaks, including hoses and gaskets.
  3. 3Check the fuel pressure with a fuel pressure gauge to ensure it meets specifications.
  4. 4Examine the mass airflow (MAF) sensor for dirt or contamination.
  5. 5Inspect the fuel injectors for clogs or leaks.
  6. 6Check the exhaust system for any leaks that may affect the oxygen sensors.

Solution

Solution

1. Preparation

  • Gather tools and parts needed for the repair.
  • Disconnect the negative terminal of the battery to ensure safety.
  • Allow the engine to cool if it has been running.

2. Inspect and Repair Vacuum Leaks

  • Tools Required: Vacuum gauge, hose clamps, screwdriver
  • Visually inspect all vacuum hoses for cracks or disconnections.
  • Use a vacuum gauge to check for proper vacuum levels.
  • Replace any damaged hoses and reattach connections securely.

3. Clean or Replace Mass Airflow Sensor

  • Tools Required: MAF cleaner or electrical cleaner, screwdriver
  • Locate the MAF sensor in the air intake duct.
  • Remove the sensor carefully without damaging it.
  • Spray MAF cleaner on the sensor element and let it dry completely.
  • Reinstall the MAF sensor and ensure it is secured.

4. Test and Repair Fuel System

  • Tools Required: Fuel pressure gauge, fuel line removal tool
  • Connect the fuel pressure gauge to the fuel rail.
  • Turn the ignition key to the "ON" position (do not start) and check the fuel pressure reading against manufacturer's specifications.
  • If the pressure is low, check the fuel pump, fuel filter, and fuel injectors for issues.
  • Replace any faulty components as necessary.

5. Inspect and Repair Exhaust Leaks

  • Tools Required: Wrench set, exhaust sealant
  • Inspect the exhaust system visually for any cracks or holes.
  • Use a wrench to tighten any loose bolts in the exhaust system.
  • Apply exhaust sealant to any small cracks if replacement is not immediately feasible.

Verification

After completing the repair, verify that the issue has been resolved:

  • Test the affected component to ensure it functions correctly
  • Check for any error codes or warning lights
  • Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • OBD-II scanner
  • Vacuum gauge
  • Fuel pressure gauge
  • MAF cleaner
  • Screwdriver set
  • Hose clamps

Parts Required

  • Vacuum hoses (if damaged)
  • Mass airflow sensor (if faulty)
  • Fuel filter (if clogged)
  • Exhaust sealant (if needed)

Additional Information

Error CodeP0174
Component

Engine

Repair Time

2-4 hours

Difficulty

medium

Severity

medium

Tools

6 items

Parts

4 items

Related Faults

Discover similar issues

  1. my Ford F-150 12th Generation (2009-2014) has an oil leak where to look

    Learn how to diagnose and repair oil leaks in Ford F-150 12th Generation (2009-2014). Step-by-step guide with symptoms, tools, and solutions.

    Component:Engine
    Symptoms
    • •Oil spots or puddles under the vehicle
    • •Low oil level warning on the dashboard
    • +{count} more

  2. why does my Ford F-150 12th Generation (2009-2014) have a strong fuel smell?

    Learn how to diagnose and fix a strong fuel smell in Ford F-150 12th Generation (2009-2014). Step-by-step guide with symptoms, diagnostic steps, and r...

    Component:Fuel System
    Symptoms
    • •Strong fuel odor inside or around the vehicle
    • •Fuel leak visible on the ground beneath the vehicle
    • +{count} more

  3. my Ford F-150 12th Generation (2009-2014) runs rich what could be the cause

    Learn how to diagnose and fix a rich fuel condition in Ford F-150 12th Generation (2009-2014). Step-by-step guide with symptoms, diagnostic steps, and...

    Component:Fuel System
    Symptoms
    • •Check engine light illuminated
    • •Poor fuel economy
    • +{count} more

  4. why does my Ford F-150 12th Generation (2009-2014) make a hissing noise when I turn

    Learn to diagnose and fix hissing noise when turning in Ford F-150 (2009-2014). Step-by-step guide with symptoms, diagnostic steps, and repair instruc...

    Component:Steering
    Symptoms
    • •Hissing or whining noise when turning the steering wheel
    • •Stiff or unresponsive steering
    • +{count} more

  5. why does my Ford F-150 12th Generation (2009-2014) overheat when idling

    Learn how to diagnose and fix overheating issues in Ford F-150 12th Generation. Step-by-step guide with diagnostic procedures and repair instructions.

    Component:Cooling System
    Symptoms
    • •Engine temperature gauge reading higher than normal
    • •Steam or coolant leaking from the engine bay
    • +{count} more

  6. how to diagnose a fuel pump issue on my Ford F-150 12th Generation (2009-2014)

    Learn how to diagnose and fix fuel pump issues in Ford F-150 12th Generation (2009-2014). Step-by-step guide with symptoms, diagnostic steps, and repa...

    Component:Fuel System
    Symptoms
    • •Engine does not start or has prolonged cranking
    • •Engine stalls while driving
    • +{count} more

Share this solution

Comments

Sign in to share your thoughts

Sign In

No comments yet

Be the first to share your thoughts

Back to Generation