how to fix the check engine light for P0174 on Ford Explorer Sixth Generation (2020-present)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal.
• Ensure the engine is cool before starting work.

2. Inspect and Replace Vacuum Hoses

• Sub-steps:
  • Visually inspect all vacuum hoses connected to the intake manifold.
  • Replace any damaged or disconnected hoses.
• Tools Required: Hose clamp pliers

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

• Sub-steps:
  • Disconnect the MAF sensor connector.
  • Remove the MAF sensor from the air intake duct.
  • Clean the sensor with MAF sensor cleaner; allow it to dry completely.
  • If cleaning does not resolve the issue, replace the MAF sensor with a new one.
• Tools Required: Torx screwdriver, MAF sensor cleaner

4. Test Fuel Pressure

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail.
  • Start the engine and observe the pressure reading; it should match manufacturer specifications (usually between 50-60 psi).
  • If the pressure is low, inspect the fuel filter and fuel pump for issues. Replace as necessary.
• Tools Required: Fuel pressure gauge

5. Inspect Air Intake System

• Sub-steps:
  • Check for any obstructions in the air filter and replace if dirty.
  • Inspect the intake manifold gasket for leaks and replace if necessary.
• Tools Required: Socket set, replacement air filter, intake manifold gasket (if needed)

6. Inspect and Test Fuel Injectors

• Sub-steps:
  • Remove the fuel rail to access the fuel injectors.
  • Inspect for leaks and clean the injectors using a fuel injector cleaner.
  • Reinstall and test the injectors for proper spray pattern if necessary.
• Tools Required: Socket set, fuel injector cleaner