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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before proceeding.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, flashlight
• Visually inspect all vacuum lines for cracks or disconnections.
• Use a vacuum gauge to confirm there are no leaks.
• Replace any damaged hoses or gaskets as necessary.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver
• Locate the MAF sensor on the air intake duct.
• Disconnect the electrical connector and remove the MAF sensor from the housing.
• Clean the sensor using MAF cleaner; do not touch the sensor elements.
• Reinstall the cleaned or replaced MAF sensor and reconnect the electrical connector.

4. Check Fuel System

• Tools Required: Fuel pressure gauge, multimeter
• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position without starting the engine and check the pressure; it should meet manufacturer specifications.
• If pressure is low, test the fuel pump and filter for proper function.
• Inspect fuel injectors for clogs or leaks; clean or replace as needed.

5. Inspect Throttle Body

• Tools Required: Throttle body cleaner, wrench
• Remove the air intake duct from the throttle body.
• Inspect the throttle body for carbon buildup.
• Clean the throttle body using throttle body cleaner.
• Reinstall the air intake duct securely.

6. Verify EGR System Function

• Tools Required: EGR valve cleaner, vacuum pump
• Inspect the EGR valve for carbon buildup.
• Clean the valve if necessary and check its operation with a vacuum pump.
• Replace the EGR valve if it is not functioning properly.