how to fix P0174 code in Volvo XC60 First Generation (2008-2017)

Learn how to diagnose and fix P0174 fuel system issue 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 vehicle's battery to ensure safety.
• Allow the engine to cool before beginning work.

2. Inspect and Fix Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, screwdriver.
• Inspect all vacuum hoses for cracks or disconnections, particularly around the intake manifold.
• Replace any damaged hoses or reconnect loose hoses.
• Check the intake manifold gasket for leaks and replace it if necessary.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner, screwdriver.
• Remove the MAF sensor from the air intake duct.
• Clean the sensor with appropriate MAF cleaner; do not touch the sensor element.
• If the sensor is damaged or cleaning does not resolve issues, replace it with a new one.

4. Check and Repair Fuel System

• Tools Required: Fuel pressure gauge, socket set.
• Attach the fuel pressure gauge to the fuel rail and turn the ignition on (do not start the engine).
• Compare the fuel pressure reading with manufacturer specifications (usually around 50-60 psi).
• If the pressure is low, check the fuel pump and filter for issues; replace them if needed.

5. Inspect and Replace Fuel Injectors (if necessary)

• Tools Required: Socket set, fuel injector puller if applicable.
• Remove the fuel rail and inspect the injectors for clogs or leaks.
• Clean the injectors using a fuel injector cleaner or replace them with new units if they are faulty.

6. Reconnect Battery and Clear Codes

• Reconnect the vehicle's battery.
• Use the OBD-II scanner to clear the P0174 code and verify that it does not return after repairs.