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 (2008-2017). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal.
• Ensure the engine is cool before working on it.

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
  2. Use a smoke machine or carburetor cleaner to identify vacuum leaks by spraying around suspected areas and watching for RPM changes.
  3. Replace any faulty hoses or gaskets found during inspection.

3. Clean or Replace MAF Sensor

• Sub-steps:
  1. Locate the MAF sensor between the air filter and throttle body.
  2. Disconnect the electrical connector from the MAF sensor.
  3. Remove the MAF sensor using a Torx screwdriver.
  4. Clean the sensor with MAF cleaner spray or replace it if damaged.
  5. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

• Sub-steps:
  1. Connect a fuel pressure gauge to the fuel rail.
  2. Turn the ignition to the ON position without starting the engine to check the pressure.
  3. Compare the reading with the manufacturer's specifications; it should typically be around 50-60 psi.
  4. If the pressure is low, inspect the fuel pump and filter, replacing as necessary.

5. Inspect Fuel Injectors

• Sub-steps:
  1. Remove the engine cover and access the fuel injectors.
  2. Check for fuel leaks around the injectors.
  3. Use an injector cleaning solution and follow the instructions for cleaning or replace the injectors if they are clogged or malfunctioning.