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 electrical shorts.
• Allow the engine to cool before starting the repair.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, scanner
• Use a vacuum gauge to check for leaks in the vacuum system.
• Inspect all vacuum hoses and connections for cracks or disconnections. Replace any damaged hoses.
• Check the intake manifold gasket for leaks and replace if necessary.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner or isopropyl alcohol, soft cloth
• Disconnect the MAF sensor electrical connector.
• Remove the MAF sensor from the intake.
• Clean the MAF sensor using MAF cleaner and a soft cloth. Allow it to dry completely before reinstalling.
• If the sensor is defective, replace it with a new one.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Locate the fuel pressure test port on the fuel rail.
• Connect the fuel pressure gauge and turn the ignition to ON (do not start the engine).
• Verify that the fuel pressure is within the specifications (usually around 55-65 PSI for F-150).
• If pressure is low, check the fuel pump and replace if necessary.

5. Test Fuel Injectors

• Tools Required: Injector cleaning kit (optional)
• Inspect the fuel injectors for clogs or leaks visually.
• If injectors are suspected to be clogged, use a cleaning kit to clean them, or replace with new injectors if necessary.

6. Reassemble and Clear Codes

• Reattach all components and ensure connections are secure.
• Reconnect the negative battery terminal.
• Use an OBD-II scanner to clear the P0174 code and run the engine to verify repair.