how to fix P0174 code in Volkswagen Golf Seventh Generation (2013-2020)?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to avoid electrical shorts.
• Allow the engine to cool completely before beginning.

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge
• Inspect the air intake hose and MAF sensor for cracks or loose fittings.
• If any leaks are found, replace the damaged hoses or re-tighten connections.
• Clean the MAF sensor with MAF sensor cleaner if dirty, following the cleaner's instructions.

3. Fuel System Check

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the ON position (do not start) and check the pressure reading. It should match the specifications found in the service manual (typically around 50-60 psi).
• If the pressure is low, replace the fuel filter and test the fuel pump operation.

4. Inspect Engine Vacuum System

• Tools Required: Vacuum gauge
• Use a vacuum gauge to check for vacuum leaks in the engine.
• Inspect all vacuum hoses and gaskets. Replace any that show signs of wear or damage.

5. Verify Fuel Injector Operation

• Tools Required: Noid light or multimeter
• Disconnect the fuel injectors and connect a noid light or multimeter to check for proper electrical operation.
• If the injectors are not functioning, replace or repair as necessary.