how to fix P0174 code in Ford F-150 14th Generation (2021-2024)

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before starting work.

2. Inspect and Repair Intake System

• Sub-steps:

  1. Visually inspect all vacuum hoses on bank 2 for cracks or disconnections.
  2. Use a smoke machine to detect vacuum leaks if necessary.
  3. Replace any damaged hoses or gaskets.

• Tools Required: Smoke machine, basic hand tools (screwdrivers, wrenches)

3. Clean or Replace MAF Sensor

• Sub-steps:

  1. Locate the MAF sensor in the air intake duct.
  2. Remove the MAF sensor connector and unscrew it from the duct.
  3. Clean the sensor with MAF cleaner spray or replace it if damaged.
  4. Reinstall the MAF sensor and reconnect the wiring harness.

• Tools Required: MAF cleaner spray, screwdriver

4. Check Fuel System

• Sub-steps:

  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition on (do not start) and check the fuel pressure reading.
  3. If the pressure is below specifications, inspect the fuel pump and filter.
  4. Replace the fuel filter if clogged and consider replacing the fuel pump if necessary.

• Tools Required: Fuel pressure gauge, basic hand tools

5. Inspect Oxygen Sensors

• Sub-steps:

  1. Locate the upstream and downstream oxygen sensors on bank 2.
  2. Check the wiring and connectors for damage or corrosion.
  3. Use a multimeter to test the sensor’s voltage output.
  4. Replace any faulty oxygen sensors.

• Tools Required: Multimeter, oxygen sensor socket