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

Solution

1. Preparation

• Gather tools and parts.
• Disconnect the negative battery terminal.
• Ensure the engine is cool before starting work.

2. Inspect and Repair Air Intake System

• Tools Required: Screwdriver set, vacuum gauge
• Inspect the air intake hoses for cracks or loose connections.
• Tighten or replace any damaged hoses.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, screwdriver
• Remove the MAF sensor from the air intake duct.
• Clean the sensor with MAF cleaner; do not touch the sensor elements.
• Reinstall the sensor securely.

4. Check and Repair Fuel Delivery System

• Tools Required: Fuel pressure gauge, socket set
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition on (do not start the engine) and check the fuel pressure against the manufacturer's specifications.
• If pressure is low, inspect and replace the fuel filter or fuel pump as necessary.

5. Inspect for Vacuum Leaks

• Tools Required: Smoke machine (optional), vacuum gauge
• Use a smoke machine to detect vacuum leaks in the intake manifold and vacuum lines.
• Repair or replace any damaged hoses or gaskets found.

6. Test and Replace Oxygen Sensor (if necessary)

• Tools Required: O2 sensor socket, multimeter
• Disconnect the oxygen sensor connector and test the sensor's voltage and resistance using a multimeter.
• Replace the sensor if it fails to meet specifications.