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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to avoid electrical shock.
• Ensure the vehicle is on a flat surface and use wheel chocks for safety.

2. Inspect Air Intake and Vacuum Lines

• Sub-steps:
  1. Visually inspect the air intake duct for cracks or loose fittings.
  2. Check all vacuum lines connected to the intake manifold for signs of wear or disconnection.
  3. Replace any damaged hoses or clamps.
• Tools Required:
  • Flashlight
  • Pliers

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Remove the MAF sensor from the air intake duct.
  2. Clean the sensor using MAF sensor cleaner (do not touch the sensor element).
  3. If cleaning does not resolve the issue, replace the MAF sensor with a new one.
• Tools Required:
  • Torx or Phillips screwdriver
  • MAF sensor cleaner

4. Check Fuel System

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail Schrader valve.
  2. Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure against specifications.
  3. If pressure is low, inspect the fuel pump, filter, and injectors for issues.
• Tools Required:
  • Fuel pressure gauge
  • Socket set

5. Inspect PCV System

• Sub-steps:
  1. Locate the PCV valve and hoses connected to the intake manifold.
  2. Remove and inspect the PCV valve for clogs; replace if necessary.
  3. Check hoses for cracks and replace as needed.
• Tools Required:
  • Pliers

6. Reassemble and Test

• Sub-steps:
  1. Reconnect all components and ensure all connections are secure.
  2. Reconnect the negative battery terminal.
  3. Start the engine and allow it to reach operating temperature, then check for any leaks.
• Tools Required:
  • None specific