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

Solution

1. Preparation

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

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers
• Remove the engine cover if applicable.
• Inspect and tighten all clamps and hoses in the air intake system.
• Replace any damaged or cracked hoses.
• Reassemble the air intake system and secure all connections.

3. Fuel Pressure Check

• Tools Required: Fuel pressure gauge
• Locate the fuel rail and connect the fuel pressure gauge.
• Turn the ignition to the "ON" position without starting the engine and check the pressure reading.
• Compare the reading to manufacturer specifications (typically around 50-60 psi for VW).
• If the pressure is low, inspect the fuel pump and filter for issues and replace as necessary.

4. MAF Sensor Cleaning/Replacement

• Tools Required: MAF sensor cleaner, Torx screwdriver
• Disconnect the MAF sensor electrical connector.
• Remove the MAF sensor from the air intake duct.
• Use MAF sensor cleaner to clean the sensor element (do not touch it physically).
• Reinstall the MAF sensor and reconnect the electrical connector.

5. Vacuum Leak Inspection

• Tools Required: Smoke machine or soapy water solution
• Use a smoke machine to introduce smoke into the intake system while the engine is running to identify leaks.
• Alternatively, spray soapy water on vacuum hoses; bubbles will indicate a leak.
• Replace any damaged vacuum hoses or gaskets found during inspection.