how to fix P0171 code on Honda CR-V Fifth Generation (2017-2022)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to ensure safety during the procedure.

2. Inspect and Repair Air Intake System

1. Visually inspect all intake hoses and connections for cracks or loose fittings.
2. Tighten any loose clamps and replace damaged hoses.
3. Use a smoke machine if available to detect hidden vacuum leaks.

3. Check and Replace Fuel Filter (if applicable)

1. Locate the fuel filter; consult the service manual for exact location.
2. Release fuel pressure by removing the fuel pump relay or fuse and starting the engine until it stalls.
3. Disconnect the fuel lines from the filter using the appropriate tools.
4. Replace the old filter with a new one, ensuring correct orientation.
5. Reconnect fuel lines securely and restore fuel pressure.

4. Test and Clean or Replace MAF Sensor

1. Disconnect the MAF sensor wiring harness.
2. Remove the sensor from the air intake housing.
3. Clean the MAF sensor with MAF cleaner; allow it to dry completely.
4. If cleaning does not resolve issues, replace the MAF sensor with a new OEM part.

5. Inspect and Clean Throttle Body

1. Remove the throttle body from the intake manifold.
2. Clean the throttle body using throttle body cleaner and a soft brush.
3. Reinstall the throttle body and ensure that the gasket is in good condition.

6. Reconnect Battery and Clear Codes

1. Reconnect the battery terminals.
2. Use the OBD-II scanner to clear the P0171 code and other related codes.