how to fix P0174 code in Ford Explorer Sixth Generation (2020-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery cable to prevent electrical shorts.
• Ensure the vehicle is on a flat surface and engage the parking brake.

2. Inspect and Repair Vacuum Leaks

1. Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
2. Use a smoke machine or carburetor cleaner to detect vacuum leaks around the intake manifold and hoses.
3. Replace any damaged hoses or gaskets found during inspection.

3. Check and Clean the MAF Sensor

1. Locate the MAF sensor, usually found in the air intake duct.
2. Disconnect the electrical connector.
3. Remove the sensor using the appropriate socket.
4. Clean the MAF sensor with MAF cleaner spray; do not touch the sensor wire.
5. Reinstall the MAF sensor, reconnect the electrical connector, and ensure it is sealed properly.

4. Test Fuel Pressure

1. Locate the fuel rail and attach a fuel pressure gauge to the service port.
2. Turn the ignition to the "ON" position without starting the engine to check the fuel pressure.
3. Compare the reading to manufacturer specifications (typically between 50-70 psi).
4. If low, inspect the fuel pump and filter for obstructions; replace if necessary.

5. Inspect Fuel Injectors

1. Remove the fuel rail from the engine, being cautious of fuel spillage.
2. Inspect each injector for clogs or leaks; clean or replace as needed.
3. Reinstall the fuel rail and ensure all connections are secure.