how to fix P0174 code in Volvo XC60 First Generation (2008-2017)

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 necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool before starting work.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  • Visually inspect all vacuum hoses for cracks or disconnections.
  • Use a smoke machine or carburetor cleaner to identify any leaks at the intake manifold and connected hoses.
  • Replace any damaged hoses with OEM parts.

3. Clean or Replace the MAF Sensor

• Sub-steps:
  • Remove the MAF sensor from the air intake duct using a Torx screwdriver.
  • Clean the MAF sensor with MAF cleaner spray (do not touch the sensor element with fingers).
  • If damaged or excessively dirty, replace the sensor with a compatible OEM part.

4. Inspect and Test the Fuel System

• Sub-steps:
  • Check the fuel pressure using a fuel pressure gauge; it should match the specifications (typically 50-60 psi).
  • If low, inspect the fuel pump, filter, and injectors for blockages or failures.
  • Clean or replace fuel injectors if necessary.

5. Clean the Throttle Body

• Sub-steps:
  • Remove the air intake duct to access the throttle body.
  • Use throttle body cleaner and a soft cloth to remove carbon buildup inside the throttle body.
  • Ensure the throttle plate moves freely and reassemble.