how to fix P0171 lean condition code on my Volvo XC60 536 (2017-Present)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical issues.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Socket set, flashlight, smoke machine (if available).
• Sub-steps:
  1. Visually inspect all vacuum lines and connections for cracks or disconnections.
  2. Use a smoke machine to detect hidden leaks if necessary.
  3. Replace any damaged hoses with OEM parts.
  4. Reassemble and reconnect all components securely.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, small screwdriver, torque wrench.
• Sub-steps:
  1. Locate the MAF sensor in the air intake system.
  2. Disconnect the sensor's electrical connector.
  3. Remove the sensor using a screwdriver.
  4. Clean the sensor with MAF cleaner and allow it to dry.
  5. If the sensor is damaged, replace it with a new OEM part.
  6. Reinstall the cleaned or new sensor and reconnect the electrical connector.

4. Check Fuel System

• Tools Required: Fuel pressure gauge, socket set.
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the "ON" position without starting the engine and check the pressure reading.
  3. Compare the reading to the specifications in the service manual.
  4. If the pressure is low, inspect and replace the fuel pump and/or fuel filter as needed.

5. Inspect and Replace Oxygen Sensors

• Tools Required: O2 sensor socket, torque wrench.
• Sub-steps:
  1. Locate the upstream and downstream oxygen sensors.
  2. Disconnect the wiring harness from the sensors.
  3. Use an O2 sensor socket to remove the old sensors.
  4. Install new OEM oxygen sensors, tightening them to the specified torque.
  5. Reconnect the wiring harness.

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0171 code.
• Start the engine and allow it to reach operating temperature.