how to fix P0171 code in Honda Pilot YF3 (2016-2022)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Air Intake System

• Inspect for Leaks:
  • Check the entire air intake system visually for cracks or loose connections.
  • Use a smoke machine or spray soapy water on the hoses to detect leaks.
• Repair or Replace:
  • Tighten or replace any damaged hoses or clamps identified during inspection.

3. Check and Clean MAF Sensor

• Remove MAF Sensor:
  • Locate the MAF sensor on the air intake duct.
  • Use a Torx screwdriver to remove the screws securing the MAF sensor.
• Clean MAF Sensor:
  • Use MAF sensor cleaner spray to gently clean the sensor element.
  • Allow it to dry completely before reinstalling.
• Reinstall MAF Sensor:
  • Secure the MAF sensor back in place with screws and reconnect the electrical connector.

4. Fuel System Inspection

• Check Fuel Pressure:
  • Connect a fuel pressure gauge to the fuel rail.
  • Turn the ignition to the ON position (without starting) and check the reading against manufacturer specifications.
• Replace Fuel Filter:
  • If the fuel pressure is low, replace the fuel filter as per the manufacturer's schedule.
• Inspect and Clean Fuel Injectors:
  • If necessary, use a fuel injector cleaner or remove and clean the injectors manually.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0171 code.