how to fix P0174 code on Ford F-150 Fourteenth Generation (2021-present)

Solution

1. Preparation

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

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps
• Instructions:
  1. Visually inspect all vacuum hoses connected to the intake manifold for wear or cracks.
  2. Use a vacuum gauge to test the intake manifold vacuum; compare readings to manufacturer specifications.
  3. Replace any damaged hoses or clamps as necessary.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner (e.g., CRC MAF Cleaner), screwdriver set
• Instructions:
  1. Locate the MAF sensor on the air intake duct.
  2. Disconnect the electrical connector.
  3. Remove the sensor using the appropriate screwdriver.
  4. Clean the sensor with MAF cleaner, ensuring not to touch the sensor element.
  5. Reinstall the sensor and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Instructions:
  1. Locate the Schrader valve on the fuel rail.
  2. Attach the fuel pressure gauge to the valve.
  3. Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure.
  4. Compare the reading to the manufacturer's specifications; replace the fuel pump if pressure is low.

5. Inspect and Test Fuel Injectors

• Tools Required: Multimeter, injector cleaning kit
• Instructions:
  1. Disconnect the fuel injector connectors.
  2. Use a multimeter to check the resistance of each injector (consult specifications).
  3. If resistance is out of range, replace the injector.
  4. Clean the injectors using an injector cleaning kit if they are functioning but dirty.