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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool if it has been running.

2. Inspect and Clean MAF Sensor

• Locate the MAF sensor in the air intake duct.
• Remove the MAF sensor using a Torx screwdriver.
• Clean the sensor with MAF cleaner spray; do not touch the sensor element.
• Reinstall the MAF sensor and ensure it's properly secured.

3. Check for Vacuum Leaks

• Visually inspect all vacuum hoses for cracks or disconnections.
• Use a smoke machine or carburetor cleaner to identify leaks around the intake manifold and vacuum lines.
• Replace any damaged hoses or components.

4. Test Fuel Pressure

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the "On" position without starting the engine to check the pressure.
• Compare the reading with the manufacturer's specifications (typically 30-40 psi for Honda).
• If pressure is low, inspect the fuel pump, filter, and lines for issues.

5. Inspect Fuel Injectors

• Remove the fuel rail and inspect the injectors for clogs or leaks.
• Clean the injectors using a professional cleaning kit if necessary.
• Reinstall the fuel rail ensuring all connections are tight.

6. Test Oxygen Sensors

• Check the operation of the upstream and downstream oxygen sensors using a multimeter.
• Replace any faulty sensors as needed.