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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before starting work on the intake or fuel system.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, pliers
• Using a vacuum gauge, connect it to a vacuum port and check for normal readings (typically around 18-22 inHg).
• Inspect all vacuum hoses for signs of wear, cracks, or damage. Replace any faulty hoses.
• Tighten all hose clamps to ensure a proper seal.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, screwdriver
• Remove the MAF sensor from the intake duct (typically held with screws).
• Spray MAF cleaner onto the sensor element to remove dirt and oil; do not touch the sensor with your hands.
• Reinstall the MAF sensor and ensure it is securely fastened.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Locate the fuel rail test port, remove the cap, and connect the fuel pressure gauge.
• Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure.
• If the pressure is below the manufacturer's specifications (typically around 30-40 PSI), inspect the fuel pump and fuel filter for issues.

5. Inspect Fuel Injectors

• Tools Required: Fuel injector cleaner, multimeter (for electrical testing)
• Remove the fuel injectors from the fuel rail.
• Clean the injectors using a fuel injector cleaning kit or replace them if they are clogged or damaged.
• Test the electrical connections of each injector with a multimeter to ensure proper operation.

6. Replace ECT Sensor (if faulty)

• Tools Required: Socket set, torque wrench
• Locate the ECT sensor on the engine (usually near the thermostat housing).
• Disconnect the electrical connector and remove the sensor using a socket.
• Install the new ECT sensor, ensuring it is torqued to manufacturer's specifications (typically around 15-20 ft-lbs).
• Reconnect the electrical connector.