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

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the vehicle battery to prevent electrical shorts.
• Ensure the engine is cool before starting repairs.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum lines and intake hoses for cracks or disconnections.
  2. Replace any damaged vacuum lines or hoses.
  3. Use carburetor cleaner to spray around the intake manifold to check for leaks; if the engine RPM changes, there is a leak.

3. Test and Clean the MAF Sensor

• Sub-steps:
  1. Disconnect the MAF sensor connector.
  2. Remove the MAF sensor using a Torx screwdriver.
  3. Clean the MAF sensor with MAF sensor cleaner; do not touch the sensor element.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check Fuel Pressure

• Sub-steps:
  1. Locate the fuel rail service port.
  2. Connect the fuel pressure gauge to the service port.
  3. Turn the ignition to the "On" position without starting the engine and read the pressure.
  4. Compare the reading to the manufacturer's specification; if low, check fuel pump and filter.

5. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the fuel rail to access the injectors.
  2. Inspect each injector for clogs or leaks visually.
  3. Clean the injectors using a fuel injector cleaner if necessary.
  4. Reinstall the fuel rail with the injectors and ensure all connections are secure.

6. Verify Throttle Body Condition

• Sub-steps:
  1. Remove the air intake duct connected to the throttle body.
  2. Inspect the throttle body for carbon buildup.
  3. Clean the throttle body with throttle body cleaner and a soft cloth.
  4. Reassemble the intake duct securely.