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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to avoid electrical issues during repairs.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge
• Sub-steps:
  1. Visually inspect the air intake hoses for cracks or loose connections.
  2. Use a vacuum gauge to check for any vacuum leaks in the intake manifold.
  3. Replace any damaged hoses or gaskets as necessary.

3. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail test port.
  2. Turn the ignition key to the ON position (do not start) and check the pressure reading.
  3. If the pressure is below specifications, replace the fuel pump or fuel filter if clogged.

4. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner or isopropyl alcohol, soft cloth
• Sub-steps:
  1. Locate the MAF sensor in the air intake path.
  2. Disconnect the electrical connector and remove the sensor.
  3. Clean the sensor wires carefully with MAF cleaner or isopropyl alcohol.
  4. Reinstall the sensor and reconnect the electrical connector.

5. Inspect and Replace Oxygen Sensors

• Tools Required: O2 sensor socket, torque wrench
• Sub-steps:
  1. Locate the bank 2 oxygen sensor (usually after the catalytic converter).
  2. Disconnect the wiring harness and use an O2 sensor socket to remove the sensor.
  3. Install a new oxygen sensor and torque to manufacturer specifications.
  4. Reconnect the wiring harness.