how to fix P0171 code in Honda Pilot YF4 (2023-Present)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before beginning work.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, pliers, vacuum gauge
• Inspect all hoses and connections for leaks.
• Replace any damaged or loose hoses.
• If a vacuum leak is detected, use a vacuum gauge to confirm the leak and repair as necessary.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, Torx screwdriver
• Remove the MAF sensor from the air intake duct using the Torx screwdriver.
• Spray the sensor with MAF cleaner and allow it to dry completely before reinstalling.
• Reinstall the MAF sensor and ensure it is securely fastened.

4. Check Fuel System

• Tools Required: Fuel pressure gauge, socket set
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "On" position (do not start the engine) and check the fuel pressure against manufacturer specifications.
• If pressure is low, inspect the fuel pump and replace it if necessary.

5. Inspect Exhaust System

• Tools Required: Visual inspection tools, jack and jack stands
• Raise the vehicle using a jack and secure it with jack stands.
• Visually inspect the exhaust manifold and pipes for leaks or damage.
• Repair or replace any leaking components.