how to fix P0174 code in Honda Pilot YF4 (2023-Present)

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal.
• Ensure the engine is cool before starting work.

2. Inspect and Repair Air Intake

• Tools Required: Socket set, screwdrivers, vacuum gauge.
• Visually inspect the air intake hoses and connections for cracks or leaks.
• Use a vacuum gauge to check for vacuum leaks; repair or replace any defective hoses.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, torque wrench.
• Remove the MAF sensor from the air intake.
• Spray MAF cleaner on the sensor elements and allow to dry completely.
• Reinstall the MAF sensor, torquing screws to manufacturer specifications.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge, safety goggles.
• Connect the fuel pressure gauge to the fuel rail.
• Start the engine and observe the pressure; it should meet Honda's specifications.
• If pressure is low, inspect the fuel pump and filter for issues, replacing as necessary.

5. Inspect and Clean Throttle Body

• Tools Required: Throttle body cleaner, soft cloth.
• Remove the throttle body from the intake manifold.
• Clean the throttle body using throttle body cleaner and a soft cloth.
• Reinstall the throttle body, ensuring all gaskets are intact.

6. Verify Fuel Injector Function

• Tools Required: Fuel injector cleaner, multimeter.
• Test each injector with a multimeter for proper resistance.
• If an injector is faulty, replace it and clean all injectors with a fuel injector cleaner.