how to fix the P0171 code on my Volvo XC60 536 (2017-Present)?

Solution

1. Preparation

• Gather necessary tools and equipment.
• Disconnect the vehicle battery to ensure safety while working on electrical components.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, torque wrench, vacuum gauge
• Sub-steps:
  1. Remove the engine cover (if applicable) by unscrewing it.
  2. Carefully inspect the air intake hoses and connections for any signs of wear or leaks.
  3. If any cracks or leaks are found, replace the affected hoses.
  4. Reattach all connections securely and torque them to the manufacturer's specifications.

3. Clean or Replace the MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver
• Sub-steps:
  1. Disconnect the electrical connector from the MAF sensor.
  2. Unscrew and remove the MAF sensor from the air intake duct.
  3. Use MAF sensor cleaner to spray both the sensor and the housing; do not touch the sensor elements.
  4. Allow it to dry completely before reinstalling.
  5. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check Fuel System

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail test port.
  2. Turn the ignition to the "ON" position (do not start the engine) and check the fuel pressure against the specifications.
  3. If the pressure is low, inspect the fuel pump, filter, and injectors for issues.

5. Inspect Vacuum Lines

• Tools Required: Visual inspection tools
• Sub-steps:
  1. Conduct a thorough visual inspection of all vacuum lines connected to the intake manifold.
  2. Replace any damaged or disconnected vacuum lines to ensure proper air-fuel mixture.