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

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

Solution

1. Preparation

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

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge.
• Remove the air intake duct and visually inspect for cracks or loose connections.
• Check all vacuum hoses for signs of wear or damage; replace any faulty hoses.
• Reinstall the air intake duct securely.

3. Check and Clean MAF Sensor

• Tools Required: MAF cleaner or isopropyl alcohol, soft cloth.
• Locate the MAF sensor, usually situated between the air filter and throttle body.
• Disconnect the electrical connector and remove the MAF sensor from the housing.
• Spray the MAF cleaner onto the sensor element; do not touch it with any tools.
• Allow it to dry completely and reinstall the sensor.

4. Inspect Fuel System

• Tools Required: Fuel pressure gauge.
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition key to the "ON" position (do not start the engine) and check the fuel pressure reading; it should meet manufacturer specifications (usually around 50-60 PSI).
• If the pressure is low, check the fuel pump and filter for issues and replace them if necessary.

5. Inspect and Test Fuel Injectors

• Tools Required: Multimeter, injector cleaning kit (if necessary).
• Disconnect the electrical connectors from each fuel injector.
• Use a multimeter to check the resistance of each injector; compare readings to specifications.
• If an injector is faulty, remove and replace it with a new one.