how to fix P0174 code in Volkswagen Golf Eighth Generation (2020-present)

Solution

1. Preparation

• Gather tools and parts needed.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery cable.

2. Inspect and Repair Air Intake

• Inspect hoses and connections: Examine the air intake ducts and vacuum lines for splits or loose connections. Replace any damaged components.
• Clean MAF Sensor: Use MAF cleaner to spray the MAF sensor element gently. Allow it to dry before reinstalling.

3. Check Fuel System

• Fuel Pressure Test: Connect a fuel pressure gauge to the fuel rail. Turn the ignition to the "ON" position (do not start) and check the pressure against the manufacturer's specifications (typically around 50-60 psi for a Golf).
• Replace Fuel Filter: If pressure is low, replace the fuel filter to ensure proper fuel flow.

4. Inspect and Clean Fuel Injectors

• Remove Fuel Injectors: Disconnect the fuel rail and carefully remove the injectors.
• Clean or Replace: Use an injector cleaning solution or ultrasonic cleaner. If they are faulty, replace them with new injectors.

5. Reassemble and Test

• Reinstall all components in reverse order of removal.
• Reconnect the battery and clear the error codes using the OBD-II scanner.
• Start the vehicle and allow it to idle for a few minutes.