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

Solution

1. Preparation

• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts.
• Gather necessary tools and parts.

2. Inspect and Replace Air Intake Components

• Tools Required: Socket set, screwdriver set, vacuum gauge.
• Sub-steps:
  1. Remove the engine cover if necessary to access the intake components.
  2. Inspect the air intake hose for cracks or loose connections; replace if damaged.
  3. Clean the MAF sensor with MAF cleaner spray and allow it to dry. Replace if cleaning does not resolve issues.

3. Check and Repair Fuel System

• Tools Required: Fuel pressure gauge, multimeter.
• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position without starting the engine and check the fuel pressure. It should match manufacturer's specifications.
  3. If pressure is low, check the fuel pump and filter. Replace the fuel filter if clogged, and consider replacing the fuel pump if pressure is still insufficient.

4. Inspect and Fix Vacuum Leaks

• Tools Required: Smoke machine or propane torch.
• Sub-steps:
  1. Use a smoke machine to detect vacuum leaks by introducing smoke into the intake system and observing for leaks.
  2. If using a propane torch, carefully pass it near suspected vacuum lines while the engine is running; an increase in RPM indicates a leak.
  3. Replace any cracked or damaged vacuum hoses and reseal intake manifold gaskets as necessary.

5. Reassemble and Clear Codes

• Sub-steps:
  1. Reinstall any components removed during the inspection.
  2. Reconnect the battery.
  3. Use the OBD-II scanner to clear the P0171 code.