how to clear P0171 code on Honda Pilot Third Generation (2016-present)?

Solution

1. Preparation

• Gather required tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to avoid electrical shorts.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdriver set
• Check the air intake ducting for cracks or loose clamps.
  • Remove the air intake duct using the appropriate socket or screwdriver.
  • Inspect for any visible damage; replace if necessary.
• Reinstall the ducting securely and ensure all clamps are tightened.

3. Clean or Replace Mass Airflow Sensor (MAF)

• Tools Required: MAF cleaner or suitable cleaning solution
• Locate the MAF sensor between the air filter and throttle body.
• Disconnect the electrical connector and remove the sensor.
• Spray MAF cleaner onto the sensor element and allow it to dry completely before reinstalling.
• Reinstall the MAF sensor and reconnect the electrical connector.

4. Inspect Fuel System Components

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail service port.
• Turn the ignition to the "On" position (do not start the engine) and check the fuel pressure reading.
  • Compare the reading to manufacturer specifications; replace the fuel pump or filter if pressure is low.
• Disconnect the gauge and reattach the service port cap.

5. Check Vacuum Lines

• Visually inspect all vacuum lines for cracks, breaks, or loose connections.
• Replace any damaged lines as necessary.

6. Reconnect Battery and Clear Codes

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