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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shock.
• Allow the engine to cool completely before beginning work.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Remove the air intake duct and visually inspect for cracks or disconnections.
  2. Replace any damaged hoses or gaskets.
  3. Reinstall the air intake duct securely.

3. Check and Clean MAF Sensor

• Sub-steps:
  1. Disconnect the MAF sensor electrical connector.
  2. Remove the MAF sensor from the air intake assembly.
  3. Using MAF sensor cleaner, spray and clean the sensor elements.
  4. Allow the sensor to dry before reinstallation.
  5. Reinstall the MAF sensor and reconnect the electrical connector.

4. Test Fuel Pressure

• Sub-steps:
  1. Locate the fuel pressure test port on the fuel rail.
  2. Connect a fuel pressure gauge to the test port.
  3. Turn the ignition to the "ON" position (do not start the engine) and check the pressure reading against manufacturer specifications (typically around 30-50 psi).
  4. If pressure is low, inspect the fuel pump and fuel filter for blockages or failures.

5. Inspect Oxygen Sensors

• Sub-steps:
  1. Locate the upstream oxygen sensor (before the catalytic converter).
  2. Disconnect the sensor’s electrical connector.
  3. Remove the sensor using an oxygen sensor socket.
  4. Inspect the sensor for any signs of wear or contamination.
  5. If necessary, replace the sensor with a new one, ensuring proper torque specifications (generally around 30 ft-lbs).
  6. Reconnect the sensor and make sure the wiring is intact.