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

Solution

1. Preparation

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

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamp pliers
• Check all vacuum hoses for signs of wear or damage.
• Replace any cracked or disconnected hoses.
• Reconnect all vacuum lines securely.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, Torx screwdriver
• Disconnect the MAF sensor connector.
• Remove the MAF sensor from the intake duct.
• Spray the MAF sensor with a dedicated cleaner and let it dry completely.
• Reinstall the MAF sensor and reconnect the electrical connector.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail test port.
• Turn the ignition to the "On" position (do not start) and check the fuel pressure reading.
• If the pressure is below specifications (usually around 30-40 PSI), inspect the fuel pump and fuel filter for issues.

5. Inspect Throttle Body and Intake Manifold

• Tools Required: Socket set, throttle body cleaner
• Remove the air intake duct using a socket set.
• Inspect the throttle body for carbon buildup and clean it using throttle body cleaner.
• Check the intake manifold gaskets for leaks and replace if necessary.

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0174 code and any other related codes.
• Start the engine and monitor for any reoccurrence of the code.