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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative terminal of the battery to prevent electrical shorts.
• Allow the engine to cool before proceeding with any repairs.

2. Inspect and Repair Air Intake System

• Sub-steps:

  1. Remove the air intake duct connected to the throttle body.
  2. Inspect the duct for cracks or loose connections; replace if damaged.
  3. Check the throttle body for carbon buildup; clean the throttle body with an appropriate cleaner.

• Tools Required:

  • Flathead screwdriver
  • Throttle body cleaner

3. Check and Clean MAF Sensor

• Sub-steps:

  1. Disconnect the electrical connector from the MAF sensor.
  2. Remove the MAF sensor using the appropriate socket.
  3. Clean the sensor with MAF cleaner and allow it to dry completely before reinstalling.

• Tools Required:

  • Socket set
  • MAF cleaner

4. Inspect and Replace Fuel Components

• Sub-steps:

  1. If fuel pressure is low, check the fuel pump relay and fuse for issues.
  2. Test the fuel pressure at the fuel rail using a fuel pressure gauge; it should meet manufacturer specifications.
  3. If necessary, replace the fuel filter and/or fuel pump to restore proper fuel pressure.

• Tools Required:

  • Fuel pressure gauge
  • Ratchet and socket set

5. Check Vacuum Lines

• Sub-steps:

  1. Visually inspect all vacuum lines for cracks, wear, or disconnections.
  2. Replace any damaged vacuum lines with new ones to ensure a proper seal.

• Tools Required:

  • Pliers
  • Replacement vacuum hose