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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool down before starting work.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Flashlight, vacuum gauge, hose clamping tools.
• Inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
• Use a vacuum gauge to check for leaks; replace any damaged hoses.
• If a leak is found at the intake manifold gasket, remove the manifold and replace the gasket.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, Torx screwdriver.
• Disconnect the MAF sensor electrical connector.
• Remove the sensor from the air intake housing using the Torx screwdriver.
• Spray the sensor with MAF cleaner and allow it to dry completely before reinstalling it.
• Reconnect the electrical connector.

4. Check Fuel System

• Tools Required: Fuel pressure gauge, basic hand tools.
• Connect the fuel pressure gauge to the fuel rail test port.
• Turn the ignition to the ON position (without starting the engine) and check the fuel pressure; it should meet manufacturer specifications.
• If pressure is low, check the fuel pump and filter for issues, replacing them as necessary.

5. Clean Throttle Body

• Tools Required: Throttle body cleaner, cleaning cloths, screwdriver.
• Remove the throttle body from the intake manifold.
• Spray throttle body cleaner inside and clean using a cloth to remove carbon buildup.
• Reinstall the throttle body with new gaskets if necessary.