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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety.
• Allow the engine to cool down before starting work.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Visually inspect the intake manifold and vacuum hoses for signs of wear or damage.
  • Use a smoke machine to detect any air leaks in the system.
  • Replace any damaged hoses or components found during inspection.

3. Clean or Replace Mass Air Flow (MAF) Sensor

• Sub-steps:
  • Locate the MAF sensor, which is typically between the air filter and the throttle body.
  • Disconnect the electrical connector from the MAF sensor.
  • Use MAF sensor cleaner to spray the sensor element gently, allowing it to dry completely before reinstallation.
  • Reconnect the sensor and ensure it is securely fastened.

4. Check Fuel System

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail test port.
  • Turn the ignition to the "ON" position (without starting) and check the fuel pressure against the manufacturer's specifications (usually around 60-70 PSI).
  • If below specifications, inspect the fuel pump and filter for issues and replace if necessary.

5. Inspect and Clean Fuel Injectors

• Sub-steps:
  • Remove the fuel rail to access the fuel injectors.
  • Use a fuel injector cleaning kit to clean the injectors or replace them if they are clogged or malfunctioning.
  • Reinstall the fuel rail and ensure proper sealing to avoid fuel leaks.

6. Reconnect Battery and Clear Codes

• Sub-steps:
  • Reconnect the vehicle battery.
  • Use the OBD-II scanner to clear the P0174 code and any other related codes.