how to address engine code P0171 on Volvo XC60 Second Generation (2018-2024)

Solution

1. Preparation

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

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, screwdriver set
• Visually inspect all vacuum lines and intake hoses for cracks or disconnections.
• Use a vacuum gauge to test for leaks; if there’s no vacuum, locate and repair the leak.
• Replace any damaged hoses and ensure all clamps are secure.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, Torx screwdriver
• Locate the MAF sensor in the air intake duct.
• Disconnect the electrical connector and unscrew the sensor from its housing.
• Spray the MAF sensor with the appropriate cleaner and let it dry completely.
• Reinstall the sensor and reconnect the electrical connector.

4. Check and Repair Fuel System

• Tools Required: Fuel pressure gauge, wrench set
• Attach a fuel pressure gauge to the fuel rail to check for proper fuel pressure (refer to the vehicle’s specification for correct pressure).
• If pressure is low, inspect the fuel filter and replace it if necessary.
• Check for any faulty fuel injectors and replace them if they are not functioning correctly.

5. Inspect Coolant Temperature Sensor

• Tools Required: Multimeter
• Locate the engine coolant temperature sensor.
• Disconnect the sensor and test it using a multimeter to ensure it is within the specified resistance range according to the service manual.
• Replace the sensor if it fails the test.