FAULTBASE
NEWSASKCars
© 2025 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
Home/Cars/Ford/Explorer/Fifth Generation (2011-2019)/how to fix P0174 code in Ford Explorer Fifth Generation (2011-2019)

how to fix P0174 code in Ford Explorer Fifth Generation (2011-2019)

Ford Explorer Fifth Generation (2011-2019)

Severity: highDifficulty: mediumError Code: P01743-5 hours
4 min read
635 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix P0174 engine too lean condition in Ford Explorer 2011-2019. Step-by-step guide with diagnostic procedures and repair instructions.

Error Code
P0174
Component
Engine
Repair Time
3-5 hours

Safety Warnings

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

Symptoms

  • •Check engine light illuminated
  • •Rough idle or stalling
  • •Reduced engine power or acceleration
  • •Poor fuel economy
  • •Increased emissions
  • •Engine backfiring

Diagnostic Steps

  1. 1Scan for error codes using an OBD-II scanner to confirm the P0174 code and check for additional codes.
  2. 2Inspect for vacuum leaks in hoses, gaskets, and the intake manifold.
  3. 3Check the fuel pressure using a fuel pressure gauge to ensure it meets manufacturer specifications.
  4. 4Inspect the Mass Air Flow (MAF) sensor and clean or replace if necessary.
  5. 5Verify the function of the fuel injectors and check for clogs or malfunctions.
  6. 6Examine the exhaust system for leaks before the oxygen sensors.

Solution

Solution

1. Preparation

  • Gather tools and parts.
  • Disconnect the battery to avoid electrical shorts.
  • Ensure the vehicle is on a flat surface and properly secured.

2. Inspect and Repair Vacuum Leaks

  • Sub-steps:
    1. Use a smoke machine or carb cleaner to detect vacuum leaks around hoses and gaskets.
    2. Tighten or replace loose or damaged hoses and gaskets as needed.
  • Tools Required: Smoke machine or carb cleaner, pliers.

3. Check and Clean the Mass Air Flow Sensor

  • Sub-steps:
    1. Locate the MAF sensor in the air intake duct.
    2. Disconnect the electrical connector and remove the sensor.
    3. Clean the sensor using MAF cleaner spray and a soft cloth.
    4. Reinstall the sensor and reconnect the electrical connector.
  • Tools Required: MAF cleaner, screwdriver.

4. Test and Adjust Fuel Pressure

  • Sub-steps:
    1. Locate the fuel rail and attach the fuel pressure gauge.
    2. Turn the ignition to the "ON" position (do not start) to check pressure.
    3. Compare the reading to manufacturer specifications (typically 50-60 psi).
    4. If low, inspect the fuel pump and fuel filter for issues and replace if necessary.
  • Tools Required: Fuel pressure gauge, socket set.

5. Inspect Fuel Injectors

  • Sub-steps:
    1. Remove the fuel rail to access fuel injectors.
    2. Inspect injectors for clogs and clean them using a fuel injector cleaner or ultrasonic cleaner.
    3. Reinstall the fuel rail and reconnect all components.
  • Tools Required: Socket set, fuel injector cleaner.

6. Check for Exhaust Leaks

  • Sub-steps:
    1. Inspect the exhaust system visually for any signs of leaks, especially before the O2 sensors.
    2. Use a smoke test to identify hidden leaks.
    3. Repair or replace any damaged sections of the exhaust system.
  • Tools Required: Smoke machine (optional), wrenches.

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
  • Fuel pressure gauge
  • MAF cleaner
  • Socket set
  • Pliers
  • Smoke machine or carb cleaner (optional)
  • Vacuum gauge

Parts Required

  • Vacuum hoses (if damaged)
  • Gaskets (if leaking)
  • Fuel filter (if pressure is low)
  • Fuel injector cleaner (if necessary)

Additional Information

Error CodeP0174
Component

Engine

Repair Time

3-5 hours

Difficulty

medium

Severity

high

Tools

7 items

Parts

4 items

Related Faults

Discover similar issues

  1. how to check the transmission fluid level in my Ford Explorer Fifth Generation (2011-2019)

    Learn how to check the transmission fluid level in your Ford Explorer (2011-2019). Step-by-step guide to ensure proper transmission function and preve...

    Component:Transmission
    Symptoms
    • •Transmission slipping or delayed engagement
    • •Unusual noises from the transmission
    • +{count} more
  2. my Ford Explorer makes a loud noise when accelerating what's wrong

    Learn how to diagnose and fix loud noise during acceleration in Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

    Component:Exhaust System
    Symptoms
    • •Loud noise that increases with acceleration
    • •Possible vibrations felt in the cabin
    • +{count} more
  3. why is my Ford Explorer making a grinding noise when braking

    Learn how to diagnose and fix grinding noise when braking in Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

    Component:Brakes
    Symptoms
    • •Grinding noise when applying brakes
    • •Decreased braking efficiency
    • +{count} more
  4. my Ford Explorer makes a popping noise when I turn, what should I do?

    Learn how to diagnose and fix popping noise during turns in Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

    Component:Suspension
    Symptoms
    • •Popping or clicking noise when turning
    • •Noise occurs at low speeds
    • +{count} more
  5. my Ford Explorer makes a grinding noise when I turn what's going on

    Learn how to diagnose and fix grinding noise when turning in Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

    Component:Steering
    Symptoms
    • •Grinding noise when turning the steering wheel
    • •Difficulty steering or increased resistance while turning
    • +{count} more
  6. my Ford Explorer ABS light is on and traction control disabled what does it mean

    Learn how to diagnose and fix ABS light and traction control issues in Ford Explorer. Step-by-step guide with diagnostic procedures and repair instruc...

    Component:Brakes
    Symptoms
    • •ABS warning light illuminated on the dashboard
    • •Traction control warning light illuminated or system disabled
    • +{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