how to fix P0174 code in Honda Pilot YF3 (2016-2022)

Solution

1. Preparation

• Gather tools and parts needed.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal.

2. Inspect and Repair Air Intake System

• Use a socket set to remove the air intake duct and inspect for cracks or loose fittings.
• Replace any damaged components or re-secure loose connections.
• Reinstall the air intake duct and ensure all clamps are tightened.

3. Check and Repair Vacuum Hoses

• Visually inspect all vacuum hoses for cracks or wear.
• Use a vacuum pump to test hoses; replace any that do not hold pressure.
• Ensure all connections are tight and secure.

4. Test and Clean MAF Sensor

• Disconnect the MAF sensor's electrical connector.
• Remove the MAF sensor using a Torx screwdriver.
• Clean the sensor with MAF cleaner spray (do not use other cleaners) and allow it to dry.
• Reinstall the sensor and reconnect the electrical connector.

5. Check Fuel Pressure

• Attach a fuel pressure gauge to the fuel rail test port.
• Turn the ignition key to the "ON" position (do not start the engine) and check the pressure reading.
• If the pressure is below specifications (usually around 40-50 psi), inspect the fuel pump and filter for issues.

6. Inspect and Test Fuel Injectors

• Use a multimeter to check the resistance of each fuel injector (specifications can be found in the service manual).
• If any injectors are out of specification, replace them.
• Reconnect all components securely.