how to fix the P0174 code on my Ford Explorer Fifth Generation (2011-2019)

Solution

1. Preparation

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

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, screwdriver set.
• Inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
• Use a vacuum gauge to test for leaks; replace any damaged hoses.
• Ensure that the intake manifold gasket is intact; replace if necessary.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, socket set.
• Locate the MAF sensor in the air intake duct.
• Disconnect the electrical connector and remove the sensor using a socket set.
• Clean the sensor using MAF sensor cleaner; do not touch the sensing elements.
• Reinstall the sensor and reconnect the electrical connector.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Locate the fuel rail and connect the fuel pressure gauge.
• Turn the ignition key to the "On" position (without starting the engine) to check fuel pressure.
• Compare the reading with the specifications for your vehicle; replace the fuel pump or filter if pressure is low.

5. Inspect Oxygen Sensors

• Tools Required: O2 sensor socket.
• Locate the bank 2 oxygen sensor and disconnect the electrical connector.
• Remove the sensor using an O2 sensor socket.
• Inspect the sensor for damage; replace if necessary.

6. Clear Codes and Test Drive

• Tools Required: OBD-II scanner.
• Use the OBD-II scanner to clear the P0174 code.
• Test drive the vehicle to ensure the issue is resolved.