how to fix P0174 code in Volkswagen Golf MK7.5 (2020-Present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Gather safety gear (gloves, goggles).

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, vacuum gauge
• Remove the engine cover if present.
• Inspect all air intake hoses for cracks and secure fit. Replace any damaged hoses.
• Check the intake manifold gasket for leaks and replace if necessary.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner spray, screwdriver
• Disconnect the MAF sensor electrical connector.
• Remove the MAF sensor from the air intake tube.
• Spray the MAF sensor with MAF cleaner. Allow it to dry completely before reinstalling.
• Reconnect the MAF sensor and ensure it is secured properly.

4. Test and Replace Fuel Pressure Regulator (if necessary)

• Tools Required: Fuel pressure gauge, wrench set
• Connect the fuel pressure gauge to the fuel rail service port.
• Turn the ignition on without starting the engine and check the fuel pressure. It should match the specifications (typically around 50-60 psi for most VW engines).
• If the pressure is low, replace the fuel pump or fuel pressure regulator as needed.

5. Inspect and Clean Fuel Injectors

• Tools Required: Fuel injector cleaning kit, O-ring set
• Remove the fuel injectors from the fuel rail.
• Use a fuel injector cleaning kit to clean each injector.
• Inspect O-rings for wear and replace if necessary before reinstallation.

6. Reassemble and Reconnect Battery

• Reinstall the intake components and ensure all clamps are tight.
• Reconnect the negative battery terminal securely.