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

Solution

1. Preparation

• Gather all tools and parts required.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Replace Vacuum Hoses

• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold and throttle body.
  2. Replace any cracked or damaged hoses with new ones.
• Tools Required: Pliers, replacement hoses.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor in the air intake system.
  2. Disconnect the electrical connector and remove the sensor.
  3. Clean the sensor with MAF cleaner or replace it if damaged.
  4. Reinstall the sensor and reconnect the electrical connector.
• Tools Required: MAF cleaner, screwdriver.

4. Check and Replace Fuel Filter (if applicable)

• Sub-steps:
  1. Locate the fuel filter in the fuel line.
  2. Disconnect the fuel lines from the filter using a line removal tool.
  3. Replace the old filter with a new one and reconnect the lines securely.
• Tools Required: Line removal tool, wrench set.

5. Test and Replace Fuel Pump (if necessary)

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position without starting the engine to check the pressure.
  3. If the pressure is below specifications, replace the fuel pump.
  4. To replace the fuel pump, remove the fuel tank and replace the pump assembly.
• Tools Required: Fuel pressure gauge, socket set, jack and jack stands.