how to address P0171 code on my Volvo XC60 Second Generation (2018-2024)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the vehicle battery to ensure safety while working on electrical components.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdriver set
• Inspect all air intake hoses for cracks or loose fittings. Replace any damaged hoses.
• Check the air filter; if dirty, replace it.
• Reassemble the intake system ensuring all clamps and connections are tight.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner (or isopropyl alcohol), screwdriver
• Disconnect the MAF sensor connector.
• Remove the MAF sensor carefully.
• Spray the MAF sensor with the cleaner and let it dry completely before reinstalling it.
• Reconnect the electrical connector and ensure it's secure.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Locate the fuel pressure test port on the fuel rail.
• Connect the fuel pressure gauge and turn the ignition to the "ON" position (do not start the engine).
• Check the pressure reading against manufacturer specifications; if lower than specified, inspect the fuel pump and pressure regulator for replacement.

5. Inspect Fuel Injectors

• Tools Required: Fuel injector cleaner (if cleaning), multimeter (if testing)
• If injectors are clogged, use a fuel injector cleaner or replace them.
• If testing, disconnect the injector connectors and use a multimeter to check resistance.