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

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the battery to avoid electrical shorts.
• Ensure the vehicle is on a flat surface and properly secured.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Use a smoke machine or carb cleaner to detect vacuum leaks around hoses and gaskets.
  2. Tighten or replace loose or damaged hoses and gaskets as needed.
• Tools Required: Smoke machine or carb cleaner, pliers.

3. Check and Clean the Mass Air Flow Sensor

• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the sensor.
  3. Clean the sensor using MAF cleaner spray and a soft cloth.
  4. Reinstall the sensor and reconnect the electrical connector.
• Tools Required: MAF cleaner, screwdriver.

4. Test and Adjust Fuel Pressure

• Sub-steps:
  1. Locate the fuel rail and attach the fuel pressure gauge.
  2. Turn the ignition to the "ON" position (do not start) to check pressure.
  3. Compare the reading to manufacturer specifications (typically 50-60 psi).
  4. If low, inspect the fuel pump and fuel filter for issues and replace if necessary.
• Tools Required: Fuel pressure gauge, socket set.

5. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the fuel rail to access fuel injectors.
  2. Inspect injectors for clogs and clean them using a fuel injector cleaner or ultrasonic cleaner.
  3. Reinstall the fuel rail and reconnect all components.
• Tools Required: Socket set, fuel injector cleaner.

6. Check for Exhaust Leaks

• Sub-steps:
  1. Inspect the exhaust system visually for any signs of leaks, especially before the O2 sensors.
  2. Use a smoke test to identify hidden leaks.
  3. Repair or replace any damaged sections of the exhaust system.
• Tools Required: Smoke machine (optional), wrenches.