how to fix P0174 code in Ford F-150 12th Generation (2009-2014)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections. Replace any damaged hoses.
  2. Check the air filter and replace it if dirty.
  3. Inspect the intake manifold gasket for leaks and replace if necessary.

3. Clean Mass Air Flow (MAF) Sensor

• Tools Required: MAF cleaner
• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the MAF sensor.
  3. Spray MAF cleaner on the sensor components and let it dry completely before reinstallation.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position (without starting the engine) to check the fuel pressure reading.
  3. Compare the reading to manufacturer specifications; if low, consider replacing the fuel pump or fuel filter.

5. Inspect Fuel Injectors

• Tools Required: Multimeter (for testing)
• Sub-steps:
  1. Remove the fuel injector connectors.
  2. Use a multimeter to check for electrical continuity and proper resistance in each injector.
  3. If an injector is faulty, replace it with a new one.

6. Clear Codes and Reassemble

• Sub-steps:
  1. Reconnect the negative battery terminal.
  2. Use the OBD-II scanner to clear the P0174 code.
  3. Start the engine and check for any reoccurring codes.