how to fix P0171 code in Volkswagen Golf Eighth Generation (2020-present)

Solution

1. Preparation

• Gather necessary tools and components.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect and Repair Air Intake System

• Tools Required: Screwdriver set, flashlight
• Check for any visible cracks or loose connections in the air intake hoses.
• Tighten or replace any loose or damaged hoses.
• Inspect the intake manifold gasket for leaks; replace if necessary.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner
• Disconnect the MAF sensor electrical connector.
• Remove the MAF sensor from the air intake duct.
• Clean the sensor with MAF sensor cleaner, allowing it to dry completely.
• Reinstall the MAF sensor and reconnect the electrical connector.

4. Test Fuel Pressure

• Tools Required: Fuel pressure gauge
• Locate the fuel rail and attach the fuel pressure gauge.
• Turn the ignition to the "ON" position (without starting the engine) to check fuel pressure.
• Compare the reading to the manufacturer's specifications. If pressure is low, inspect the fuel pump and fuel filter for issues.

5. Inspect and Clean Fuel Injectors

• Tools Required: Fuel injector cleaning kit (if necessary)
• If injectors are suspected to be clogged, remove them from the fuel rail.
• Clean the injectors using a fuel injector cleaning kit or replace them if cleaning is not effective.

6. Reassemble and Reset Codes

• Reinstall any components removed during the inspection and repair process.
• Reconnect the battery.
• Use the OBD-II scanner to clear the P0171 code and any other stored codes.