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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to ensure safety during electrical work.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Visually inspect all vacuum lines and hoses for cracks or disconnections.
  • Use a smoke machine or carburetor cleaner to detect leaks around the intake manifold and hoses.
  • Replace any damaged vacuum lines or gaskets as needed.

3. Clean the MAF Sensor

• Tools Required: MAF sensor cleaner
• Sub-steps:
  • Disconnect the MAF sensor connector.
  • Remove the MAF sensor from the air intake duct.
  • Spray MAF sensor cleaner on the sensing element; do not touch it.
  • Allow the sensor to dry completely before reinstallation.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  • Locate the fuel pressure test port on the fuel rail.
  • Connect the fuel pressure gauge to the test port.
  • Turn the ignition to the ON position (without starting the engine) to check the fuel pressure.
  • If the pressure is below specifications, inspect the fuel pump and filter for issues.

5. Inspect and Clean Fuel Injectors

• Tools Required: Fuel injector cleaning kit
• Sub-steps:
  • Remove the fuel injectors from the fuel rail.
  • Use the fuel injector cleaning kit to clean each injector according to the manufacturer's instructions.
  • Reinstall the injectors ensuring that all O-rings are intact.

6. Reassemble and Reconnect

• Sub-steps:
  • Reinstall any components removed during the inspection and cleaning process.
  • Reconnect the battery.
  • Clear the P0171 code using the OBD-II scanner.