how to fix P0174 code in Ford Explorer Fifth Generation (2011-2019)

Solution

1. Preparation

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

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps.
• Inspect all vacuum lines connected to the intake manifold for cracks or disconnections.
• Use a vacuum gauge to check for any leaks; replace or reattach any faulty hoses.
• Inspect the intake manifold gasket for leaks; replace if necessary.

3. Fuel System Check

• Tools Required: Fuel pressure gauge.
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "On" position (without starting the engine) and check the fuel pressure.
• Compare the reading to the manufacturer specifications (usually between 30-50 PSI for most Ford engines).
• If pressure is low, check the fuel pump and filter, replacing them as needed.

4. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner or isopropyl alcohol, soft brush.
• Disconnect the MAF sensor electrical connector.
• Remove the MAF sensor from the intake duct.
• Spray MAF cleaner on the sensor elements and let it dry completely before reinstalling.
• Reconnect the sensor and ensure the connection is secure.

5. Inspect Fuel Injectors

• Tools Required: Injector cleaning kit, multimeter.
• Remove the fuel injectors from the fuel rail.
• Use an injector cleaning kit to clean the fuel injectors according to manufacturer instructions.
• Test the injectors with a multimeter to check for proper resistance (consult specifications).