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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent any electrical shorts.
• Allow the engine to cool before working on the intake system.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Visually inspect all vacuum hoses connected to the intake manifold and throttle body for cracks or disconnections.
  • Use a smoke machine or propane torch to locate any vacuum leaks while monitoring engine RPM.
  • Repair or replace any damaged vacuum hoses.

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Locate the MAF sensor in the air intake duct.
  • Disconnect the electrical connector and remove the mounting screws.
  • Clean the sensor using MAF sensor cleaner spray; do not touch the sensor with your fingers.
  • If the sensor is damaged, replace it with a new one.

4. Inspect and Replace Fuel Filter (if needed)

• Sub-steps:
  • Locate the fuel filter and relieve fuel system pressure by removing the fuel pump relay.
  • Disconnect the fuel lines from the filter using a fuel line removal tool.
  • Replace the old filter with a new one and reconnect the fuel lines securely.

5. Test and Adjust Fuel Delivery

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail.
  • Start the engine and check if the fuel pressure meets manufacturer specifications (typically around 50-60 psi).
  • If the pressure is low, check the fuel pump and fuel injectors for proper operation.