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

Solution

1. Preparation

• Tools Required: OBD-II scanner, fuel pressure gauge, socket set, multimeter, cleaning spray for MAF sensor, shop towels.
• Disconnect the negative battery cable to prevent electrical shorts.

2. Inspect Air Intake System

• Sub-steps:
  1. Visually inspect the air intake hose for cracks or disconnections.
  2. Check all vacuum hoses connected to the intake manifold for leaks. Replace any damaged hoses.
  3. Tighten any loose clamps around the intake system.

3. Check Fuel Pressure

• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail test port.
  2. Turn the ignition to the "ON" position without starting the engine to check the fuel pressure reading.
  3. Compare the reading to the manufacturer’s specifications (usually around 50-60 psi for most Ford engines).
  4. If pressure is low, investigate the fuel pump and filter for issues. Replace as necessary.

4. Clean MAF Sensor

• Sub-steps:
  1. Disconnect the electrical connector from the MAF sensor.
  2. Remove the MAF sensor from the air intake duct using a socket set.
  3. Spray the MAF sensor with MAF cleaner and allow it to dry completely before reinstallation.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

5. Inspect Throttle Body

• Sub-steps:
  1. Remove the air intake duct to access the throttle body.
  2. Inspect the throttle body for carbon buildup. Use throttle body cleaner and a soft cloth to clean it if necessary.
  3. Ensure the throttle plate opens and closes freely.

6. Fuel Injector Inspection

• Sub-steps:
  1. Remove the fuel rail to access the fuel injectors.
  2. Inspect each injector for clogs or leakage. Clean or replace as necessary.
  3. Reinstall the fuel rail and ensure all connections are secure.