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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative terminal of the battery.

2. Inspect and Replace Vacuum Hoses

• Sub-steps:
  • Visually inspect all vacuum hoses for signs of wear, cracks, or disconnections.
  • Replace any damaged hoses with OEM replacement parts.
• Tools Required:
  • Pliers
  • Hose removal tool (if necessary)

3. Clean or Replace MAF Sensor

• Sub-steps:
  • Remove the MAF sensor from the air intake duct.
  • Use MAF cleaner spray to clean the sensor; avoid touching the sensor elements.
  • Reinstall the sensor or replace it if damaged.
• Tools Required:
  • Screwdriver or socket set
  • MAF cleaner spray

4. Check Fuel Pressure

• Sub-steps:
  • Connect a fuel pressure gauge to the fuel rail test port.
  • Turn the ignition on (do not start the engine) to check for pressure; it should match manufacturer specifications (usually around 50-60 psi).
  • If pressure is low, inspect the fuel pump, fuel filter, and fuel injectors for issues.
• Tools Required:
  • Fuel pressure gauge

5. Inspect Throttle Body

• Sub-steps:
  • Remove the air intake duct to access the throttle body.
  • Clean the throttle body using throttle body cleaner and a soft cloth.
  • Reinstall the intake duct securely.
• Tools Required:
  • Throttle body cleaner
  • Soft cloth
  • Socket set

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any stored codes.