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

Solution

1. Preparation

• Disconnect the negative battery terminal to ensure safety.
• Gather necessary tools and parts for the repair.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, screwdriver
• Inspect all vacuum lines connected to the intake manifold for cracks or disconnections.
• If leaks are found, replace or repair the affected hoses.
• Ensure that all clamps are properly tightened to prevent future leaks.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdrivers
• Remove the MAF sensor from the air intake duct.
• Clean the sensor with MAF cleaner, avoiding contact with the sensor element.
• If the sensor is faulty or heavily contaminated, replace it with a new one.

4. Test and Replace Fuel Filter (if necessary)

• Tools Required: Fuel pressure gauge, socket set
• Attach the fuel pressure gauge to the fuel rail and turn the ignition to the "ON" position (do not start the engine).
• Check the fuel pressure reading against the manufacturer specifications (usually around 30-50 psi).
• If the pressure is low, replace the fuel filter.

5. Inspect and Replace Fuel Injectors

• Tools Required: Fuel injector puller, socket set
• Remove the fuel rail and carefully pull out the fuel injectors.
• Inspect for clogs and test for proper operation using an injector tester.
• Replace any faulty injectors with new ones.