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

Solution

1. Preparation

• Gather tools and parts needed.
• Disconnect the battery to prevent electrical shorts.
• Ensure the engine is cool before starting.

Tools Required:

• OBD-II scanner
• Fuel pressure gauge
• Socket set
• Torque wrench
• Multimeter
• Cleaning solution (MAF cleaner)

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Remove the air intake duct from the throttle body.
  2. Inspect the duct for cracks or loose connections.
  3. Replace any damaged hoses or gaskets.
  4. Reassemble the air intake duct securely.

3. Check and Clean MAF Sensor

• Sub-steps:
  1. Disconnect the MAF sensor connector.
  2. Remove the MAF sensor from the air intake housing.
  3. Spray MAF cleaner on the sensor elements and let it dry completely.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Test Fuel Pressure

• Sub-steps:
  1. Locate the fuel rail and attach the fuel pressure gauge to the test port.
  2. Turn the ignition to the ON position (do not start the engine) to check fuel pressure.
  3. Compare the reading to the manufacturer's specifications (typically around 50-60 PSI).
  4. If pressure is low, check the fuel pump and fuel filter for issues.

5. Inspect PCV System

• Sub-steps:
  1. Locate the PCV valve and hose.
  2. Remove the PCV valve and check it for blockage or malfunction.
  3. Replace the PCV valve if necessary, and ensure the hose is not cracked or leaking.