how to fix the P0171 code on my Volvo XC60 Second Generation (2018-2024)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down if previously operated.

2. Inspect and Repair Air Intake System

• Sub-steps:
  1. Visually inspect the intake manifold and all associated hoses for cracks or damage.
  2. Replace any damaged hoses or fittings.
  3. Ensure that the air filter is clean and replace it if necessary.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, Torx screwdriver
• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Carefully disconnect the electrical connector and remove the sensor using the Torx screwdriver.
  3. Spray the MAF sensor with MAF cleaner and allow it to dry completely.
  4. Reinstall the sensor and reconnect the electrical connector.

4. Test and Repair Fuel System

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail service port.
  2. Turn the ignition to the "On" position (do not start the engine) and check the fuel pressure against specifications (typically around 50-60 psi).
  3. If the pressure is low, inspect the fuel filter and fuel pump for issues.
  4. Replace the fuel filter if it is clogged, and consider replacing the fuel pump if inadequate pressure persists.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0171 code and any other stored codes.