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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shock.
• Allow the engine to cool down before starting work.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Hose clamps, vacuum gauge, flashlight.
• Sub-steps:
  1. Use a vacuum gauge to check for leaks; the reading should be steady and within specifications.
  2. Visually inspect all vacuum hoses for cracks or disconnections. Replace any damaged hoses.
  3. Check the intake manifold gaskets for any signs of wear or leaks; replace if necessary.

3. Check and Clean MAF Sensor

• Tools Required: MAF sensor cleaner or electrical contact cleaner, screwdriver.
• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the MAF sensor from the duct.
  3. Spray the MAF sensor with the cleaner; allow it to dry completely before reinstalling.

4. Verify Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail test port.
  2. Turn on the ignition to the "On" position (do not start) and observe the pressure reading.
  3. If the pressure is below specifications, check the fuel pump and filter for clogs or failures.

5. Inspect Fuel Injectors

• Tools Required: Multimeter, fuel injector cleaner, or replacement injectors.
• Sub-steps:
  1. Test the resistance of each fuel injector using a multimeter; ensure they are within the specified range.
  2. If any injectors are faulty, replace them. If they are functional, consider cleaning them with a fuel injector cleaner.