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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal for safety.
• Allow the engine to cool down before working on any components.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect the air intake hoses for cracks or disconnections. Tighten or replace as necessary.
  2. Check the intake manifold gasket for leaks. Replace if damaged.
• Tools Required: Socket set, flashlight

3. Clean or Replace Mass Air Flow (MAF) Sensor

• Sub-steps:
  1. Disconnect the MAF sensor electrical connector.
  2. Remove the MAF sensor from the air intake duct.
  3. Clean the MAF sensor with MAF cleaner. Allow it to dry completely.
  4. Reinstall the MAF sensor and reconnect the electrical connector.
• Tools Required: Torx screwdriver, MAF cleaner

4. Check and Repair Fuel System

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail to check for proper fuel pressure (should be around 30-40 PSI).
  2. If pressure is low, inspect the fuel pump and replace the fuel filter if clogged.
  3. Replace the fuel pump if necessary.
• Tools Required: Fuel pressure gauge, socket set

5. Inspect and Replace Engine Coolant Temperature Sensor

• Sub-steps:
  1. Locate the engine coolant temperature sensor (usually near the thermostat housing).
  2. Disconnect the electrical connector and remove the sensor.
  3. Install a new coolant temperature sensor and reconnect the electrical connector.
• Tools Required: Socket set