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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers
  • Remove the air intake duct and inspect for cracks or disconnections.
  • Replace any damaged hoses or gaskets.
  • Reinstall the air intake duct securely.

3. Check and Clean MAF Sensor

• Tools Required: MAF sensor cleaner
  • Remove the MAF sensor from the air intake system.
  • Spray the MAF sensor with MAF cleaner and allow it to dry completely.
  • Reinstall the MAF sensor ensuring it is seated properly.

4. Test and Adjust Fuel System

• Tools Required: Fuel pressure gauge
  • Connect the fuel pressure gauge to the fuel rail.
  • Start the engine and check that the fuel pressure meets manufacturer specifications (typically 55-70 psi for F-150).
  • If pressure is low, check fuel pump operation, fuel filter, and lines for blockages.

5. Inspect and Test Fuel Injectors

• Tools Required: Multimeter, fuel injector cleaning kit (if necessary)
  • Disconnect the fuel injector connectors and test each injector with a multimeter for resistance.
  • If an injector is faulty, replace it.
  • Clean injectors if they are clogged using a fuel injector cleaning kit.

6. Clear Error Codes and Test

• Use an OBD-II scanner to clear the P0174 code.
• Reconnect the negative battery terminal.
• Start the engine and monitor for any reoccurrence of the code.