how do I fix P0171 code in Honda Pilot Third Generation (2016-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working.
• Allow the engine to cool down before proceeding with repairs.

2. Inspect and Replace Air Intake Components

• Inspect the air filter: Remove the air filter and check for dirt or blockages. Replace it if necessary.
• Check intake hoses: Visually inspect all intake hoses for cracks or loose connections. Replace any damaged hoses.

3. Clean or Replace MAF Sensor

• Remove MAF sensor: Disconnect the electrical connector and unscrew the MAF sensor from the intake.
• Clean the MAF sensor: Use MAF cleaner to spray the sensor elements. Allow it to dry completely before reinstalling.
• Reinstall MAF sensor: Reattach the sensor to the intake and reconnect the electrical connector.

4. Inspect Fuel System

• Check fuel pressure: Connect a fuel pressure gauge to the fuel rail and turn the ignition to the "ON" position without starting the engine. Ensure the pressure is within specifications (usually around 30-50 PSI).
• Replace fuel filter: If the pressure is low, consider replacing the fuel filter and checking the fuel pump.

5. Inspect for Vacuum Leaks

• Visual inspection: Check all vacuum hoses and gaskets for wear and tear. Replace any that are damaged.
• Smoke test: If necessary, perform a smoke test to identify any hidden vacuum leaks.

6. Reconnect Battery and Clear Codes

• Reconnect the battery terminal.
• Use the OBD-II scanner to clear the P0171 code and any other stored codes.