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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal.
• Allow the engine to cool.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge
• Inspect the air intake duct for any cracks or loose fittings. Tighten or replace as necessary.
• Check the air filter for cleanliness; replace if dirty.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, socket set
• Remove the MAF sensor from the air intake.
• Spray the MAF sensor with MAF cleaner and allow it to dry completely.
• Reinstall the MAF sensor securely.

4. Test and Repair Fuel System

• Tools Required: Fuel pressure gauge, wrench set
• Connect the fuel pressure gauge to the fuel rail and start the engine. Compare the reading with manufacturer specifications.
• If the pressure is low, check the fuel pump and replace if necessary.
• Inspect and clean the fuel injectors using an injector cleaner or replace them if clogged.

5. Check Vacuum Lines

• Tools Required: Visual inspection tools
• Inspect all vacuum lines for cracks or disconnections.
• Replace any damaged vacuum lines to ensure proper airflow.

6. Clear Codes and Test

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0171 code.
• Start the engine and monitor for any reoccurrence of the code.