how to fix P0171 code in Honda CR-V Sixth Generation (2023-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shock.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Remove the air intake duct connected to the throttle body.
  • Inspect the duct for any cracks or loose connections; replace if damaged.
  • Check the air filter; replace if dirty or clogged.

3. Clean the MAF Sensor

• Tools Required: MAF sensor cleaner
• Sub-steps:
  • Locate the MAF sensor in the air intake system.
  • Disconnect the electrical connector and remove the sensor from the housing.
  • Spray the MAF sensor with the cleaner and allow it to dry completely before reinstallation.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  • 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 pressure reading against specifications (typically around 40-50 psi).
  • If the pressure is low, inspect the fuel pump and fuel filter for issues, and replace if necessary.

5. Inspect Fuel Injectors

• Tools Required: Injector cleaning kit (if necessary)
• Sub-steps:
  • Remove the fuel rail and inspect the injectors for clogs or leaks.
  • Clean the injectors using an injector cleaning kit, or replace if they are damaged.

6. Check for Vacuum Leaks

• Sub-steps:
  • Using a smoke machine or carburetor cleaner, check for vacuum leaks around the intake manifold and hoses.
  • Repair or replace any leaking components.