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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, screwdriver
• Use a vacuum gauge to check for leaks in the intake system.
• Visually inspect all hoses and connections for cracks or disconnections.
• If leaks are found, replace damaged hoses or tighten loose connections.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner or isopropyl alcohol, soft cloth
• Remove the MAF sensor from the air intake duct.
• Spray the MAF sensor with MAF cleaner, avoiding contact with the sensor element.
• Allow the sensor to dry completely before reinstalling it.
• If cleaning does not resolve the issue, replace the MAF sensor with a new one.

4. Check and Repair Fuel Delivery

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail.
• Turn on the ignition (do not start the engine) and check the fuel pressure against the manufacturer's specifications.
• If the pressure is low, inspect the fuel pump, filter, and lines for blockages or damage.
• Replace any faulty components as necessary.

5. Inspect Exhaust System

• Tools Required: Visual inspection tools
• Inspect the exhaust manifold and pipes for any cracks or holes.
• Ensure that all connections are tight and there are no leaks.
• Repair or replace any damaged exhaust components.

6. Replace Oxygen Sensors (if necessary)

• Tools Required: O2 sensor socket, socket set
• If tests indicate faulty oxygen sensors, disconnect the battery.
• Use the O2 sensor socket to remove the old sensor from the exhaust manifold or pipe.
• Install the new sensor and reconnect any electrical connectors.
• Reconnect the battery terminal.