how to fix the P0171 code in Honda Pilot Third Generation (2016-present)

Solution

1. Preparation

• Gather all tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, pliers
• Sub-steps:
  1. Visually inspect the air intake duct and connections for cracks or loose fittings.
  2. Tighten any loose clamps or fittings.
  3. Replace any damaged hoses or components.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, screwdriver
• Sub-steps:
  1. Locate the MAF sensor in the air intake path.
  2. Remove the MAF sensor from its housing using a screwdriver.
  3. Spray MAF cleaner on the sensor elements; do not touch them with your fingers.
  4. Allow it to dry completely before reinstalling.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail service port.
  2. Turn the ignition key to the ON position (do not start) and check the reading.
  3. If the pressure is below specifications, inspect the fuel pump and fuel filter for issues.
  4. Replace the fuel filter if clogged, and consider replacing the fuel pump if necessary.

5. Inspect Fuel Injectors

• Tools Required: Injector cleaner or replacement injectors
• Sub-steps:
  1. Remove the fuel rail to access the fuel injectors.
  2. Inspect each injector for clogs or leaks.
  3. Clean the injectors using an appropriate cleaning solution or replace them if faulty.

6. Reconnect Battery and Clear Codes

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