how do I address the P0171 code in my Honda Pilot YF4 (2023-Present)?

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect Air Intake System

• Tools Required: Socket set, flashlight
• Visually inspect the intake manifold and associated hoses for cracks or loose connections.
• Use a smoke machine or carburetor cleaner to check for vacuum leaks.
• Tighten any loose connections or replace damaged hoses as necessary.

3. Clean MAF Sensor

• Tools Required: MAF cleaner, soft cloth
• Remove the MAF sensor from the air intake duct using a socket set.
• Clean the sensor with MAF cleaner and let it dry completely before reinstalling.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge
• Locate the fuel rail and connect the fuel pressure gauge to the service port.
• Turn the ignition key to the "On" position (do not start the engine) and check the fuel pressure reading.
• Compare the reading to the manufacturer’s specifications; if it's below specifications, consider replacing the fuel pump or fuel filter.

5. Clean Throttle Body

• Tools Required: Throttle body cleaner, soft cloth, socket set
• Remove the air intake duct connected to the throttle body.
• Spray throttle body cleaner into the throttle body while manually opening the throttle plate.
• Wipe clean with a soft cloth and ensure no cleaner residue remains.

6. Inspect Fuel Injectors

• Tools Required: Fuel injector cleaning kit (optional), socket set
• Remove the fuel rail with injectors attached from the engine.
• Inspect the injectors for clogs or leaks and clean if necessary. If injectors are defective, replace them.