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

Solution

1. Preparation

• Gather all required tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Inspect and Repair Air Intake System

• Tools Required: Screwdriver set, pliers
• Sub-steps:
  1. Remove the engine cover if necessary.
  2. Visually inspect the intake hoses and connections for cracks or looseness.
  3. Tighten any loose clamps and replace any damaged hoses.

3. Clean the MAF Sensor

• Tools Required: MAF cleaner spray
• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Carefully disconnect the electrical connector from the MAF sensor.
  3. Remove the sensor using the appropriate screwdriver.
  4. Spray MAF cleaner onto the sensor and let it dry completely before reinstalling.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Locate the fuel rail and connect the fuel pressure gauge to the service port.
  2. Turn the ignition to the "ON" position to check the pressure reading.
  3. Compare the reading to the manufacturer specifications (typically around 50-60 psi).
  4. If pressure is low, inspect the fuel pump and filter for issues.

5. Inspect Fuel Injectors

• Tools Required: Fuel injector cleaning kit
• Sub-steps:
  1. Remove the fuel rail to access the injectors.
  2. Inspect each injector for signs of clogging or damage.
  3. If necessary, use a cleaning kit to clean the injectors or replace them if faulty.

6. Reassemble and Reconnect

• Sub-steps:
  1. Reinstall the fuel rail and connectors.
  2. Reconnect the MAF sensor and air intake duct.
  3. Reattach the engine cover if removed.
  4. Reconnect the negative battery terminal.