how to fix P0174 code in Ford F-150 Fourteenth Generation (2021-present)

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative terminal of the battery.
• Ensure the vehicle is on a level surface and securely supported.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect the air intake hoses for cracks or loose connections; replace any damaged hoses.
  2. Remove the air intake duct and inspect the throttle body for carbon buildup; clean with throttle body cleaner if necessary.
  3. Reconnect the air intake duct securely.

3. Check and Clean MAF Sensor

• Sub-steps:
  1. Disconnect the MAF sensor electrical connector.
  2. Remove the MAF sensor from the air intake housing.
  3. Spray MAF sensor cleaner onto the sensing elements; allow it to dry completely before reinstalling.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Inspect and Test Fuel System

• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail.
  2. Turn the ignition key to the 'ON' position (do not start the engine) and check the fuel pressure; it should meet specifications (typically 55-65 PSI).
  3. If low, check the fuel pump, fuel filter, and fuel lines for blockages or failures.
  4. Replace the fuel filter if clogged and test the fuel pump functionality.

5. Repair or Replace Faulty Components

• Sub-steps:
  1. If fuel injectors are suspected to be faulty, perform a flow test and clean or replace them as necessary.
  2. Replace any damaged vacuum hoses and gaskets found during inspection.
  3. If the problem persists, consider replacing the engine control module (ECM) as a last resort.