how to fix the P0171 code on my Volkswagen Golf Eighth Generation (2020-present)

Solution

1. Preparation

• Gather tools and parts needed for repairs.
• Disconnect the negative terminal of the battery to ensure safety.
• Allow the engine to cool before beginning work.

2. Inspect and Repair Air Intake System

• Tools Required: Screwdriver set, flashlight
• Check the air filter and replace it if dirty.
• Inspect the air intake hoses for cracks or loose fittings; replace any damaged hoses.
• Reattach any loose connections to ensure a proper seal.

3. Test and Clean MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver
• Locate the MAF sensor in the air intake system.
• Disconnect the electrical connector and remove the sensor.
• Spray MAF sensor cleaner on the sensor element and allow it to dry.
• Reinstall the sensor and reconnect the electrical connector.

4. Check Fuel System

• Tools Required: Fuel pressure gauge
• Attach the fuel pressure gauge to the fuel rail's test port.
• Start the engine and monitor the fuel pressure; it should meet the manufacturer specifications (typically 50-60 psi).
• If the pressure is low, inspect the fuel pump and replace if necessary.

5. Inspect Vacuum Hoses

• Tools Required: Visual inspection tools
• Trace all vacuum lines from the intake manifold to various components.
• Replace any damaged or cracked hoses that could lead to a vacuum leak.

6. Examine Fuel Injectors

• Tools Required: Fuel injector cleaning kit or replacement injectors
• If injectors are clogged, clean them using a fuel injector cleaning kit or replace them if necessary.
• Ensure that all connections are secure and free from leaks.