how to fix P0174 code in Volvo XC60 Second Generation (2018-2024)

Learn how to diagnose and fix P0174 engine lean condition in Volvo XC60. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to avoid electrical shorts.
• Allow the engine to cool before performing any repairs.

2. Inspect and Repair Air Intake System

• Sub-steps:
  • Remove the engine cover if applicable.
  • Visually inspect all air intake hoses for cracks or loose connections.
  • Tighten or replace any loose or damaged hoses.
  • Use a smoke machine to detect any hidden vacuum leaks.

3. Clean or Replace Mass Air Flow (MAF) Sensor

• Sub-steps:
  • Disconnect the MAF sensor connector.
  • Remove the MAF sensor from the intake duct.
  • Clean the MAF sensor with MAF cleaner spray.
  • Allow the sensor to dry, then reinstall it. If damaged, replace it with a new sensor.

4. Fuel System Inspection

• Sub-steps:
  • Check the fuel pump operation by using a fuel pressure gauge.
  • Ensure fuel pressure meets specifications (typically between 50-60 psi).
  • Replace the fuel filter if it is clogged or if it has not been changed as per maintenance schedule.

5. Check Oxygen Sensors

• Sub-steps:
  • Inspect the wiring and connections of the oxygen sensors for damage.
  • Use a multimeter to test the sensors; replace if readings are out of specifications.