how to resolve P0171 lean code in my Honda Pilot YF3 (2016-2022)?

Solution

1. Preparation

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

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge.
• Inspect the air intake hose for cracks or loose connections.
• Inspect all vacuum hoses for leaks; replace any damaged hoses.
• Reattach any disconnected components securely.

3. Test and Clean MAF Sensor

• Tools Required: MAF sensor cleaner.
• Carefully remove the MAF sensor from the air intake.
• Spray the MAF sensor with MAF cleaner and allow it to dry.
• Reinstall the sensor ensuring it is properly connected.

4. Test Fuel System Pressure

• Tools Required: Fuel pressure gauge.
• Connect the fuel pressure gauge to the fuel rail service port.
• Turn the ignition to the ON position without starting the engine and check the pressure reading.
• If pressure is low, check the fuel pump and replace if necessary.

5. Inspect Oxygen Sensors

• Tools Required: O2 sensor socket.
• Locate the upstream oxygen sensor and check its wiring and connections.
• If the sensor appears damaged or has no signal, replace it with a new sensor.

6. Test Fuel Injectors

• Tools Required: Fuel injector tester.
• Disconnect the fuel injectors and use the tester to check for proper operation.
• Clean or replace any faulty injectors.