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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery cable to ensure safety.
• Remove any engine covers or components obstructing access to the intake manifold and fuel system.

2. Inspect Vacuum Hoses

• Sub-steps:
  • Visually inspect all vacuum hoses leading to and from the intake manifold.
  • Replace any damaged or cracked hoses.
• Tools Required: Pliers (if clamps are present)

3. Clean the MAF Sensor

• Sub-steps:
  • Remove the MAF sensor from the air intake duct.
  • Use MAF sensor cleaner to gently spray the sensor elements.
  • Allow it to dry completely before reinstallation.
• Tools Required: Screwdriver set, MAF sensor cleaner

4. Check Fuel Pressure

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the "ON" position without starting the engine and check the fuel pressure.
  • Compare the reading to the manufacturer specifications; replace the fuel filter or pump if pressure is low.
• Tools Required: Fuel pressure gauge

5. Inspect Intake Manifold Gaskets

• Sub-steps:
  • Remove the intake manifold if necessary.
  • Check the gaskets for signs of wear or damage.
  • Replace gaskets if they are compromised.
• Tools Required: Socket set, torque wrench (for reinstallation)

6. Verify Oxygen Sensor Function

• Sub-steps:
  • Use a multimeter to check the voltage output of the upstream oxygen sensor on Bank 2 while the engine is running.
  • Replace the sensor if it is not within the specified voltage range.
• Tools Required: Multimeter