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

Solution

1. Preparation

• Gather required tools and parts.
• Disconnect the vehicle's battery to ensure safety.
• Ensure the vehicle is parked on a level surface and engage the parking brake.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, socket set.
• Inspect the intake manifold and all associated hoses for cracks or loose connections.
• Use a vacuum gauge to check for leaks; if a leak is detected, replace the faulty component.
• Reconnect any disconnected hoses and ensure all connections are tight.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver.
• Remove the MAF sensor from the intake duct.
• Spray the MAF sensor with MAF cleaner and allow it to dry completely. Ensure you do not touch the sensor with your fingers.
• Reinstall the MAF sensor securely.

4. Check Fuel System

• Tools Required: Fuel pressure gauge.
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure; it should match manufacturer specifications.
• If pressure is low, inspect the fuel pump and fuel filter. Replace as necessary.

5. Inspect and Replace Oxygen Sensors (if necessary)

• Tools Required: O2 sensor socket, wrench.
• Remove the oxygen sensor from the exhaust manifold.
• Check the sensor for signs of damage or carbon buildup.
• If defective, replace with a new oxygen sensor according to manufacturer specifications.

6. Final Assembly and Reset

• Reconnect the battery.
• Clear the P0171 code with an OBD-II scanner.
• Start the engine and let it idle for a few minutes to ensure the system is functioning correctly.