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

Solution

1. Preparation

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

2. Inspect and Repair Air Intake System

• Tools Required: Screwdriver set, hose clamps, flashlight.
• Steps:
  1. Remove the engine cover if applicable.
  2. Visually inspect the intake hoses for cracks or loose connections; tighten or replace as necessary.
  3. Check the intake manifold gasket for leaks and replace if damaged.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner (or appropriate cleaning solution), torx or socket set.
• Steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the sensor using the appropriate tool.
  3. Clean the sensor element with MAF cleaner; do not touch the sensor with fingers.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Steps:
  1. Connect the fuel pressure gauge to the fuel rail service port.
  2. Turn the ignition key to the "On" position (do not start the engine) and check the pressure reading against the specifications (typically 55-65 psi for F-150).
  3. If pressure is low, check the fuel pump and filter for issues and replace as necessary.

5. Inspect Vacuum Lines

• Tools Required: Visual inspection tools (flashlight).
• Steps:
  1. Trace all vacuum lines from the intake manifold and check for cracks or disconnections.
  2. Replace any damaged vacuum lines to restore proper pressure.