how to fix P0171 code in my Volvo XC60 Second Generation (2018-2024)

Solution

1. Preparation

• Gather tools and parts required.
• Disconnect the battery to prevent any electrical shorts during repairs.
• Allow the engine to cool down before starting work.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, socket set
  • Sub-steps:
    1. Visually inspect all vacuum hoses and connections for cracks or disconnections.
    2. Use a vacuum gauge to check the intake manifold vacuum.
    3. Replace any damaged hoses or gaskets.
    4. Ensure all connections are secure.

3. Check and Clean MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver
  • Sub-steps:
    1. Disconnect the MAF sensor electrical connector.
    2. Remove the MAF sensor from the intake duct.
    3. Spray MAF sensor cleaner on the sensor to remove dirt and debris.
    4. Allow it to dry completely before reinstalling.
    5. Reconnect the sensor and ensure a secure fit.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge
  • Sub-steps:
    1. Locate the fuel rail service port and remove the cap.
    2. Attach the fuel pressure gauge securely to the service port.
    3. Turn the ignition to the "ON" position (without starting the engine) to check the pressure.
    4. Compare the reading to the manufacturer's specifications. Replace the fuel pump or filter if pressure is low.

5. Replace Air Filter

• Tools Required: Screwdriver (if applicable)
  • Sub-steps:
    1. Open the air filter housing.
    2. Remove the old air filter and inspect the housing for debris.
    3. Install a new air filter according to the manufacturer's specifications.
    4. Close the air filter housing securely.

6. Clear Codes and Test

• Tools Required: OBD-II scanner
  • Sub-steps:
    1. Use the OBD-II scanner to clear the P0171 code from the ECM.
    2. Start the engine and let it run for a few minutes.
    3. Take the vehicle for a test drive to ensure that the check engine light does not reappear.