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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety.
• Allow the engine to cool before beginning work.

2. Inspect and Repair Air Intake System

• Tools Required: Vacuum gauge, hose clamps, basic hand tools
• Visually inspect all hoses and connections in the air intake system for cracks or disconnections.
• Use a vacuum gauge to test for leaks. Repair or replace any damaged hoses or fittings.

3. Check and Clean the MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver
• Locate the MAF sensor, usually positioned between the air filter and the throttle body.
• Disconnect the electrical connector and remove the MAF sensor.
• Spray the MAF sensor with a dedicated cleaner and allow it to dry completely before reinstalling.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail test port.
• Turn the ignition key to the "ON" position (do not start the engine) and check the fuel pressure. It should be within manufacturer specifications (usually around 30-45 psi).
• If the pressure is low, inspect the fuel pump and filter for issues.

5. Examine and Clean Fuel Injectors

• Tools Required: Fuel injector cleaner, basic hand tools
• Remove the fuel injectors from the fuel rail.
• Clean the injectors using a fuel injector cleaning kit or replace them if they are clogged or faulty.

6. Inspect Oxygen Sensors

• Tools Required: O2 sensor socket, basic hand tools
• Check the oxygen sensor located before and after the catalytic converter.
• Replace any faulty oxygen sensors as needed.