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

Solution

1. Preparation

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

Tools Required:

• OBD-II scanner
• Multimeter
• Fuel pressure gauge
• Socket set
• Screwdrivers
• Torque wrench

2. Inspect and Repair Air Intake System

• Sub-step 1: Visually inspect all air intake components for cracks or loose connections.
• Sub-step 2: Tighten any loose clamps and replace damaged hoses.
• Sub-step 3: If any components are damaged, replace them with OEM parts.

3. Clean or Replace MAF Sensor

• Sub-step 1: Remove the MAF sensor from the air intake duct.
• Sub-step 2: Use MAF cleaner to clean the sensor element. Avoid touching it directly.
• Sub-step 3: Reinstall the MAF sensor and ensure it is properly connected.

4. Check and Adjust Fuel System

• Sub-step 1: Attach the fuel pressure gauge to the fuel rail.
• Sub-step 2: Turn the ignition key to the "on" position (do not start) and check the fuel pressure reading against specifications.
• Sub-step 3: If pressure is low, inspect the fuel pump, filter, and lines for issues; replace as necessary.

5. Inspect and Test Fuel Injectors

• Sub-step 1: Disconnect the fuel injector connectors.
• Sub-step 2: Use a multimeter to check the resistance of each injector.
• Sub-step 3: Clean injectors using a professional fuel injector cleaning kit or replace if necessary.

6. Verify ECT Sensor Operation

• Sub-step 1: Locate the ECT sensor and unplug it.
• Sub-step 2: Use a multimeter to test the resistance across the terminals; compare against manufacturer specifications.
• Sub-step 3: Replace the ECT sensor if readings are out of spec.