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

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

Solution

1. Preparation

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

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamp pliers
• Instructions:
  1. Use a vacuum gauge to check for leaks in the intake manifold and hoses.
  2. If leaks are found, replace or repair the faulty hoses and gaskets.
  3. Reattach any removed components securely.

3. Clean or Replace the MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver
• Instructions:
  1. Locate the MAF sensor in the air intake duct.
  2. Disconnect the electrical connector and remove the sensor using a screwdriver.
  3. Spray MAF sensor cleaner on the sensing elements and allow it to dry.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check Fuel Pressure and Injectors

• Tools Required: Fuel pressure gauge, injector cleaning kit
• Instructions:
  1. Connect the fuel pressure gauge to the fuel rail and turn the ignition to the "ON" position (do not start the engine).
  2. Check the pressure reading against manufacturer specifications (typically between 50-60 psi).
  3. If pressure is low, inspect the fuel filter and replace it if clogged. If the pump is faulty, replace it.
  4. For injectors, use an injector cleaning kit to clean them or replace faulty injectors if necessary.

5. Test Drive and Reset Codes

• After completing repairs, reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature.
• Take the vehicle for a test drive to ensure the engine runs smoothly.
• Use the OBD-II scanner to clear any stored codes and check for reoccurrence.