how to fix P0174 code in Ford Explorer Fifth Generation (2011-2019)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to prevent electrical shorts and ensure safety.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Visually inspect all air intake hoses and connections for wear or damage.
  • Replace any damaged hoses or clamps found during inspection.
  • Ensure the intake manifold is properly secured and inspect for any leaks.

3. Test and Replace Fuel Pressure Regulator (if necessary)

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure reading.
  • If pressure is below specifications (usually around 55-65 psi for this vehicle), replace the fuel pressure regulator.
  • Follow the manufacturer's instructions for replacement, ensuring to relieve fuel pressure before removal.

4. Clean or Replace MAF Sensor

• Sub-steps:
  • Locate the MAF sensor in the air intake duct.
  • Disconnect the electrical connector and remove the sensor.
  • Clean the MAF sensor with MAF cleaner spray (do not touch the sensor with fingers or tools).
  • If severely damaged, replace the MAF sensor with a new one.

5. Inspect and Clean Fuel Injectors

• Sub-steps:
  • Remove the fuel rail assembly according to the service manual, ensuring to relieve fuel pressure first.
  • Inspect each injector for clogs or leaks.
  • Use a fuel injector cleaner kit to clean the injectors or replace them if necessary.
  • Reinstall the fuel rail and ensure all connections are secure.