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

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal.
• Allow the engine to cool down before beginning work.

2. Inspect Air Intake System

• Tools Required: Socket set, screwdrivers
• Instructions:
  1. Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
  2. Tighten any loose clamps on the intake system.
  3. Replace any damaged hoses or gaskets.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, Torx screwdriver
• Instructions:
  1. Locate the MAF sensor in the air intake path.
  2. Disconnect the electrical connector and remove the sensor using a Torx screwdriver.
  3. Clean the sensor with MAF cleaner; do not touch the sensor element.
  4. Reinstall the sensor and reconnect the electrical connector.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Instructions:
  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 pressure.
  3. Compare the reading to manufacturer specifications (typically around 30-40 psi).
  4. If the pressure is low, check the fuel pump and filter for issues.

5. Inspect Fuel Injectors

• Tools Required: Fuel injector cleaning kit or replacement injectors
• Instructions:
  1. If the fuel pressure is normal, inspect the injectors for leaks or clogs.
  2. Use a cleaning kit to clean the injectors if necessary or replace them if they are faulty.

6. Clear Codes and Test Drive

• Tools Required: OBD-II scanner
• Instructions:
  1. Use the OBD-II scanner to clear the P0174 code from the ECM.
  2. Take the vehicle for a test drive to ensure that the issue is resolved and the check engine light does not return.