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

Learn how to diagnose and fix P0174 engine too 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 prevent electrical shorts during repairs.
• Allow the engine to cool before proceeding.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge.
• Steps:
  1. Remove the engine cover and air intake duct to access the intake manifold.
  2. Visually inspect all hoses and gaskets for signs of wear or damage.
  3. Replace any damaged hoses or gaskets as necessary.
  4. Reconnect all components securely.

3. Check and Clean MAF Sensor

• Tools Required: MAF sensor cleaner.
• Steps:
  1. Locate the MAF sensor in the air intake path.
  2. Disconnect the electrical connector from the MAF sensor.
  3. Remove the MAF sensor from its housing.
  4. Spray MAF sensor cleaner onto the sensor elements and allow it to dry.
  5. Reinstall the MAF sensor and reconnect the electrical connector.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Steps:
  1. Locate the fuel rail pressure test port and attach the fuel pressure gauge.
  2. Turn the ignition to the "ON" position (without starting the engine) to check pressure.
  3. Compare the reading to manufacturer specifications; if it's below specifications, check the fuel pump and filter.
  4. If necessary, replace the fuel pump or filter.

5. Inspect and Test Fuel Injectors

• Tools Required: Multimeter, fuel injector cleaner (if needed).
• Steps:
  1. Disconnect the fuel injector connectors.
  2. Use a multimeter to test the resistance of each injector; compare to manufacturer specifications.
  3. If an injector is faulty, replace it.
  4. Clean injectors with a fuel injector cleaning kit if needed.