my Ford Explorer has a check engine light and a P0174 code, what does that mean?

Solution

1. Preparation

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

2. Inspect Air Intake System

• Tools Required: Socket set, screwdrivers
• Remove the air intake duct and visually inspect for cracks or loose fittings.
• Tighten or replace any damaged components as necessary.

3. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail’s test port.
• Turn the ignition to the "ON" position (do not start the engine) and record the pressure reading.
• If pressure is below specifications, check the fuel pump and filter for issues.

4. Clean MAF Sensor

• Tools Required: MAF sensor cleaner
• Remove the MAF sensor from the intake system.
• Spray the MAF sensor with the cleaner and allow it to dry completely before reinstalling.

5. Inspect Fuel Injectors

• Tools Required: Fuel injector cleaning kit (if necessary)
• Visually inspect the fuel injectors for signs of leaks or blockage.
• If clogged, use the fuel injector cleaning kit to clean the injectors.

6. Test for Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner
• Introduce smoke into the intake system and observe for any leaks.
• Alternatively, spray carburetor cleaner around suspected areas and listen for changes in engine idle.