how to fix P0174 code in Volkswagen Golf MK6 (2009-2014)

Solution

1. Preparation

• Gather tools and necessary parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool down before beginning work.

2. Inspect and Replace Damaged Components

1. Inspect Air Intake System:

   • Check for loose or damaged hoses. Replace any that are cracked or leaking.
   • Tighten all clamps and ensure a secure connection.

2. Clean the MAF Sensor:

   • Remove the MAF sensor using a Torx screwdriver.
   • Use MAF cleaner spray to clean the sensor. Allow it to dry completely before reinstalling.

3. Check and Replace Fuel Filter:

   • Locate the fuel filter and relieve fuel pressure by removing the fuel pump fuse and starting the engine until it stalls.
   • Disconnect fuel lines using a fuel line removal tool, and replace the filter with a new one.
   • Reconnect fuel lines and fuse.

3. Test Fuel Pressure

• Connect a fuel pressure gauge to the fuel rail.
• Turn the ignition to the ON position (without starting) to check pressure. It should be within manufacturer specifications (typically around 50-60 psi).
• If pressure is low, inspect the fuel pump and fuel pressure regulator for issues.

4. Clear Codes and Reassemble

• Reconnect the battery.
• Use the OBD-II scanner to clear the P0174 code and any other stored codes.
• Reassemble any components removed during inspection.