how to fix P0174 code in Ford F-150 13th Generation (2015-2020)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, basic hand tools
  • Use a vacuum gauge to test for leaks in the vacuum system.
  • Inspect all vacuum lines and connections carefully.
  • Replace any damaged or leaking vacuum hoses.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, small screwdriver
  • Remove the MAF sensor from the intake duct.
  • Spray the MAF sensor thoroughly with MAF cleaner and allow it to dry.
  • Reinstall the MAF sensor and ensure all connections are secure.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
  • Connect the fuel pressure gauge to the fuel rail.
  • Turn the ignition to the "ON" position (do not start the engine) and record the pressure reading.
  • Compare the reading to manufacturer specifications (usually around 55-65 psi for F-150).
  • If the pressure is low, check the fuel pump and filter for issues.

5. Replace Intake Manifold Gaskets (if necessary)

• Tools Required: Socket set, torque wrench, gasket scraper
  • Remove the intake manifold by disconnecting necessary components (throttle body, sensors, etc.).
  • Remove old gaskets and clean the mating surfaces.
  • Install new intake manifold gaskets and reinstall the manifold, following manufacturer torque specifications.

6. Test Oxygen Sensors

• Tools Required: Multimeter
  • Disconnect the oxygen sensors and test their resistance and voltage output according to manufacturer specifications.
  • Replace any faulty oxygen sensors before reassembling components.