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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the engine is cool before starting work.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Perform a visual inspection of all vacuum hoses and connections in the intake system.
  2. Use a smoke machine or propane torch (with caution) to locate leaks.
  3. Replace any damaged hoses or gaskets as necessary.

3. Fuel System Inspection

• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position (without starting the engine) to check the pressure.
  3. Compare the reading to manufacturer specifications. If low, check the fuel pump and filter for issues.
  4. Replace the fuel filter if it is clogged and consider replacing the fuel pump if it is faulty.

4. MAF Sensor Cleaning/Replacement

• Sub-steps:
  1. Locate the MAF sensor (typically located between the air filter and throttle body).
  2. Disconnect the electrical connector and remove the MAF sensor.
  3. Use MAF sensor cleaner to spray the sensing elements without touching them.
  4. Allow it to dry completely before reinstalling. If damaged, replace the sensor.

5. Fuel Injector Cleaning/Replacement

• Sub-steps:
  1. Remove the fuel injector rail from the engine.
  2. Disconnect the electrical connectors and fuel lines carefully.
  3. Use a fuel injector cleaning kit to clean or replace the injectors as necessary.
  4. Reinstall the injector rail ensuring all connections are secure.