FAULTBASE
NEWSASKCars
© 2025 FAULTBASE
All rights reserved.
v2.0.0 • Production
ContactPrivacyImpressum
Home/Cars/Ford/F-150/14th Generation (2021-2024)/how to fix P0174 code in Ford F-150 14th Generation (2021-2024)

how to fix P0174 code in Ford F-150 14th Generation (2021-2024)

Ford F-150 14th Generation (2021-2024)

Severity: highDifficulty: mediumError Code: P01742-4 hours
4 min read
606 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 lean condition in Ford F-150 (2021-2024). 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 systems.
  • ⚠Allow the engine to cool before inspecting components to prevent burns.

Symptoms

  • •Check engine light illuminated
  • •Rough idle or stalling
  • •Decreased fuel efficiency
  • •Poor acceleration performance
  • •Engine misfires or hesitation during acceleration

Diagnostic Steps

  1. 1Scan the vehicle using an OBD-II scanner to confirm the P0174 code and check for any related codes.
  2. 2Inspect the air intake system for any leaks, including the intake manifold and vacuum hoses.
  3. 3Check the fuel pressure using a fuel pressure gauge to ensure it meets manufacturer specifications.
  4. 4Inspect the mass air flow (MAF) sensor for dirt or damage and clean or replace as necessary.
  5. 5Examine the fuel injectors for proper operation and any signs of clogs or leaks.
  6. 6Verify the operation of the oxygen sensors, especially the upstream sensor, to ensure they are functioning correctly.

Solution

Solution

1. Preparation

  • Gather necessary tools and parts.
  • Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Air Intake System

  • Tools Required: Socket set, screwdrivers
  • Steps:
    1. Visually inspect the air intake ducts for cracks or loose connections.
    2. Tighten any loose clamps and replace any damaged hoses.
    3. If necessary, replace the intake manifold gasket.

3. Test and Adjust Fuel System

  • Tools Required: Fuel pressure gauge
  • Steps:
    1. Connect the fuel pressure gauge to the fuel rail.
    2. Start the engine and check the fuel pressure against manufacturer specifications (typically around 50-60 PSI for F-150).
    3. If the pressure is low, inspect the fuel pump and fuel filter for issues. Replace as needed.

4. Clean or Replace MAF Sensor

  • Tools Required: MAF sensor cleaner
  • Steps:
    1. Locate the MAF sensor in the air intake path.
    2. Disconnect the electrical connector and remove the sensor.
    3. Clean the sensor with MAF cleaner and allow it to dry.
    4. Reinstall the sensor and reconnect the electrical connector.

5. Inspect and Clean Fuel Injectors

  • Tools Required: Injector cleaning kit (if applicable)
  • Steps:
    1. Remove the fuel injectors from the fuel rail.
    2. Inspect the injectors for clogs or leaks.
    3. Clean the injectors using an appropriate injector cleaner or replace them if they are faulty.

6. Check Oxygen Sensors

  • Tools Required: Multimeter
  • Steps:
    1. Locate the upstream oxygen sensor.
    2. Disconnect the sensor and use a multimeter to test the sensor's resistance.
    3. Replace the oxygen sensor if it is out of specification.

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
  • Socket set
  • Fuel pressure gauge
  • MAF sensor cleaner
  • Multimeter

Parts Required

  • Intake manifold gasket (if needed)
  • Fuel filter (if needed)
  • MAF sensor (if cleaning does not resolve the issue)
  • Fuel injectors (if needed)
  • Oxygen sensor (if needed)

Additional Information

Error CodeP0174
Component

Engine

Repair Time

2-4 hours

Difficulty

medium

Severity

high

Tools

5 items

Parts

5 items

Related Faults

Discover similar issues

  1. why does my Ford F-150 14th Generation (2021-2024) feel like it’s stalling when driving

    Learn how to diagnose and fix engine stalling issues in Ford F-150 14th Generation (2021-2024). Step-by-step guide with diagnostic procedures and repa...

    Component:Engine
    Symptoms
    • •Engine stutters or hesitates during acceleration
    • •Unusual drops in RPM while driving
    • +{count} more

  2. my Ford F-150 14th Generation (2021-2024) is shaking at high speeds, what could it be?

    Learn how to diagnose and fix shaking issues at high speeds in Ford F-150 (2021-2024). Step-by-step guide with diagnostic procedures and repair instru...

    Component:Suspension
    Symptoms
    • •Shaking or vibrations felt in the steering wheel or cabin at speeds above 55 mph
    • •Uneven tire wear
    • +{count} more

  3. why does my Ford F-150 14th Generation (2021-2024) smell like gas

    Learn how to diagnose and fix gasoline odor issues in Ford F-150 (2021-2024). Step-by-step guide with diagnostic procedures and repair instructions.

    Component:Fuel System
    Symptoms
    • •Strong gasoline smell, particularly near the engine compartment or under the vehicle
    • •Fuel gauge showing erratic readings
    • +{count} more

  4. my Ford F-150 14th Generation (2021-2024) AC is not blowing cold air how can I fix it

    Learn how to diagnose and fix the AC not blowing cold air in a 2021-2024 Ford F-150. Step-by-step guide with symptoms, diagnostic steps, and repair in...

    Component:HVAC
    Symptoms
    • •AC system blowing warm air
    • •Unusual noises from the AC compressor
    • +{count} more

  5. my Ford F-150 14th Generation (2021-2024) check engine light is flashing what does it mean

    Learn how to diagnose and fix a flashing check engine light on your 2021-2024 Ford F-150. Step-by-step guide with symptoms, diagnostics, and repair in...

    Component:Engine
    Symptoms
    • •Flashing check engine light
    • •Rough engine idle
    • +{count} more

  6. my Ford F-150 14th Generation (2021-2024) pulls to the right when driving what’s wrong

    Learn how to diagnose and fix pulling to the right in your Ford F-150. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

    Component:Suspension
    Symptoms
    • •Vehicle consistently drifts to the right during straight driving
    • •Uneven tire wear observed on front tires
    • +{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