why is my Volvo XC60 536 (2017-Present) getting a P0171 code

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Visually inspect the air intake hoses for cracks or loose fittings.
  • Tighten any loose clamps or replace damaged hoses as necessary.
  • Clean the MAF sensor using MAF cleaner spray (do not use other cleaners).

3. Check and Replace Fuel Filter (if necessary)

• Sub-steps:
  • Locate the fuel filter (refer to the service manual for specific location).
  • Relieve fuel system pressure by depressing the Schrader valve (use a rag to catch fuel).
  • Disconnect the fuel lines from the filter and remove the old filter.
  • Install the new fuel filter, ensuring correct orientation and tight connections.

4. Inspect and Repair Vacuum Lines

• Sub-steps:
  • Examine all vacuum lines for wear and tear.
  • Replace any damaged or cracked vacuum hoses.
  • Ensure all connections are secure and leak-free.

5. Test and Replace Oxygen Sensors (if necessary)

• Sub-steps:
  • Use a multimeter to test the output voltage of the oxygen sensors.
  • If the readings are outside the specified range, replace the faulty sensor.
  • Reinstall the new sensor and ensure a secure connection.