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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, vacuum gauge, fuel pressure gauge, multimeter, cleaning supplies.
• Ensure the vehicle is parked on a flat surface and the engine is cool. Disconnect the battery.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect the air intake ducting from the air filter to the throttle body for cracks or loose fittings.
  2. Tighten any loose clamps or replace damaged hoses.
  3. Clean the MAF sensor using MAF cleaner. Allow it to dry completely before reinstalling.

3. Check Fuel System

• Sub-steps:
  1. Use a fuel pressure gauge to measure fuel pressure at the fuel rail. Compare the reading with specifications in the service manual.
  2. If the pressure is low, replace the fuel filter and inspect the fuel pump for proper operation.
  3. Remove and inspect fuel injectors for blockage or leaks; replace if necessary.

4. Inspect Vacuum System

• Sub-steps:
  1. Use a vacuum gauge to check for leaks while the engine is running.
  2. Replace any damaged vacuum hoses.
  3. Ensure that all connections to intake manifold and throttle body are secure.

5. Test and Replace Oxygen Sensors (if necessary)

• Sub-steps:
  1. Use a multimeter to test the output voltage of the oxygen sensors while the engine is running.
  2. If the readings are out of specification, replace the faulty oxygen sensor.

6. Clear Codes and Test Drive

• Sub-steps:
  1. Reconnect the battery and use the OBD-II scanner to clear the trouble codes.
  2. Start the engine and allow it to reach operating temperature.
  3. Perform a test drive to ensure the code does not return.