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 shocks.
• Allow the engine to cool down before working on components.

2. Inspect for Vacuum Leaks

• Tools Required: Vacuum gauge, smoke machine (optional)
• Use a vacuum gauge to check for proper vacuum levels.
• If available, use a smoke machine to identify leaks in the intake system.
• Repair any damaged hoses or gaskets as needed.

3. Clean or Replace the MAF Sensor

• Tools Required: MAF cleaner spray, Torx screwdriver
• Remove the MAF sensor from the air intake duct.
• Spray the MAF sensor with MAF cleaner and allow it to dry.
• If damaged, replace with a new MAF sensor.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the "On" position (do not start engine) and check the pressure reading.
• If pressure is below the manufacturer's specifications, inspect the fuel pump and filter, replacing as necessary.

5. Inspect and Clean Fuel Injectors

• Tools Required: Injector cleaning kit or ultrasonic cleaner
• Remove the fuel injectors from the fuel rail.
• Use an injector cleaning kit or ultrasonic cleaner to clean the injectors thoroughly.
• Reinstall cleaned or new injectors ensuring proper sealing.

6. Verify Oxygen Sensor Function

• Tools Required: Multimeter
• Locate the oxygen sensors and test their voltage output using a multimeter while the engine is running.
• Replace any oxygen sensors that do not meet specifications.