how to fix P0174 code in Ford F-150 13th Generation (2015-2020)

Solution

1. Preparation

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

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Remove the air intake ducting to access the throttle body and MAF sensor.
  • Inspect all hoses and connections for cracks or loose fittings.
  • Replace any damaged vacuum hoses or components.
  • Reassemble the air intake system and ensure all connections are tight.

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Remove the MAF sensor from the air intake.
  • Use MAF sensor cleaner to clean the sensor element.
  • Allow it to dry completely before reinstalling.
  • If damaged, replace the MAF sensor with a new one.

4. Test and Repair Fuel System

• Sub-steps:
  • Connect the fuel pressure gauge to the fuel rail.
  • Turn the ignition to the "ON" position (do not start) and check the pressure; it should be within the manufacturer's specifications (typically around 30-45 psi for F-150).
  • If low, check the fuel pump operation and replace if necessary.
  • Inspect the fuel filter and replace it if it's clogged.

5. Oxygen Sensor Check

• Sub-steps:
  • Inspect the wiring and connectors to the oxygen sensors for damage or corrosion.
  • Test the oxygen sensors with a multimeter to ensure they are functioning within specifications.
  • Replace any faulty oxygen sensors.