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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery to avoid electrical shorts.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Visually inspect all vacuum hoses, intake manifold gaskets, and throttle body seals.
  • Use a smoke machine or carburetor cleaner to detect leaks.
  • Replace any damaged hoses or gaskets as needed.
• Tools Required: Smoke machine or carburetor cleaner, pliers, socket set.

3. Check and Clean the MAF Sensor

• Sub-steps:
  • Locate the MAF sensor in the air intake duct.
  • Disconnect the electrical connector and remove the sensor.
  • Clean the sensor with MAF cleaner spray and let it dry before reinstallation.
  • Reinstall the sensor and reconnect the electrical connector.
• Tools Required: Torx or socket set, MAF cleaner spray.

4. Test and Replace Fuel Injectors

• Sub-steps:
  • Use a fuel pressure gauge to verify fuel pressure; it should be within the specified range (usually around 55-65 psi).
  • If pressure is low, inspect the fuel pump and filter for issues.
  • If injectors are suspected to be faulty, remove and inspect them. Clean or replace as necessary.
• Tools Required: Fuel pressure gauge, socket set, injector cleaner kit.

5. Reset the ECM

• Sub-steps:
  • Reconnect the battery after completing repairs.
  • Use the OBD-II scanner to clear the P0174 code from the ECM.
  • Start the engine and allow it to reach normal operating temperature.
• Tools Required: OBD-II scanner.