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

Learn how to diagnose and fix P0174 engine lean condition in Volvo XC60 (2018-2024). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Repair Air Intake

• Sub-steps:

  • Remove the engine cover if applicable.
  • Inspect all air intake hoses and connections for cracks or disconnections.
  • Replace any damaged hoses or connections as needed.

• Tools Required: Pliers, socket set, flashlight

3. Clean or Replace MAF Sensor

• Sub-steps:

  • Locate the MAF sensor in the air intake duct.
  • Disconnect the electrical connector and remove the sensor.
  • Clean the MAF sensor using MAF sensor cleaner. Allow it to dry completely before reinstalling.
  • If damaged, replace it with a new MAF sensor.

• Tools Required: Screwdriver set, MAF cleaner

4. Check Fuel Pressure

• Sub-steps:

  • Locate the fuel pressure test port on the fuel rail.
  • Connect the fuel pressure gauge to the port.
  • Turn the ignition to the "ON" position (do not start the engine) and observe the pressure reading.
  • If the pressure is below specifications (check service manual for specific values), replace the fuel pump or check the fuel filter for clogs.

• Tools Required: Fuel pressure gauge

5. Inspect and Repair Vacuum Lines

• Sub-steps:

  • Visually inspect all vacuum lines connected to the intake manifold.
  • Replace any cracked or disconnected vacuum lines.

• Tools Required: Pliers, socket set