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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety while working on the vehicle.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge
• Inspect air intake hoses and connections for leaks:
  • Remove the air intake duct and visually inspect for cracks or damage.
  • Use a vacuum gauge to check for leaks in hoses.
  • Replace any damaged hoses or clamps.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, socket set
• If the MAF sensor is dirty:
  • Disconnect the MAF sensor connector.
  • Remove the MAF sensor from the intake.
  • Spray MAF sensor cleaner on the sensor and let it dry.
• If the MAF sensor is damaged, replace it with a new one:
  • Install the new MAF sensor and reconnect the connector.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Connect a fuel pressure gauge to the fuel rail:
  • Turn the ignition on (do not start the engine) and check the pressure.
  • Compare the reading to manufacturer specifications (usually around 50-60 psi).
  • If pressure is low, inspect the fuel pump and filter for replacement.

5. Inspect and Replace Oxygen Sensors (if needed)

• Tools Required: O2 sensor socket, wrench
• Inspect the Bank 2 oxygen sensor:
  • If readings are faulty or the sensor is damaged, replace it.
  • Remove the old sensor and install the new one, ensuring a proper seal.

6. Reassemble Components

• Reattach any components that were removed during inspection or repair.
• Reconnect the negative battery terminal.