how to fix P0174 code in Ford Explorer Sixth Generation (2020-present)

Solution

1. Preparation

• Tools Required: OBD-II scanner, vacuum gauge, fuel pressure gauge, MAF sensor cleaner, socket set, torque wrench, safety goggles, gloves.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery before beginning work on electrical components.

2. Inspect Air Intake System

• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold and replace any that are cracked or damaged.
  2. Check the intake manifold gaskets for signs of wear or damage and replace as necessary.
  3. Use a vacuum gauge to detect any additional vacuum leaks; repairs should be made to any leaks found.

3. Fuel System Check

• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail and turn the ignition to the "On" position without starting the engine.
  2. Record the fuel pressure and compare it to the manufacturer's specifications (typically around 50-60 psi).
  3. If the pressure is low, check the fuel pump and fuel filter for issues; replace if needed.

4. MAF Sensor Cleaning or Replacement

• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the sensor using the appropriate socket.
  3. Clean the sensor with MAF cleaner and allow it to dry; if damaged, replace with a new sensor.
  4. Reinstall the cleaned or new MAF sensor and reconnect the electrical connector.

5. Fuel Injector Inspection

• Sub-steps:
  1. Remove the fuel rail with the injectors attached (ensure fuel pressure is released first).
  2. Inspect each injector for clogs or leaks; clean with an appropriate injector cleaner or replace if defective.
  3. Reinstall the fuel rail and ensure all connections are secure.

6. Recheck Exhaust System

• Sub-steps:
  1. Inspect the exhaust system, particularly around the oxygen sensors, for any leaks or damage.
  2. Repair or replace any damaged sections of the exhaust system to ensure proper operation.