how to fix P0174 code in Volkswagen Golf Eighth Generation (2020-present)

Solution

1. Preparation

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

2. Inspect and Repair Air Intake System

• Tools Required: Vacuum gauge, hose clamps, socket set.
• Inspect all vacuum hoses for cracks or disconnections.
• Use a vacuum gauge to check for leaks; repair or replace any faulty hoses.
• Tighten any loose clamps on the intake side.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner (or isopropyl alcohol), Torx screwdriver.
• Disconnect the electrical connector from the MAF sensor.
• Remove the MAF sensor from the intake duct.
• Clean the sensor with MAF cleaner. Allow it to dry completely before reinstallation.
• Reinstall the MAF sensor and reconnect the electrical connector.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Locate the fuel rail pressure test port.
• Connect the fuel pressure gauge to the test port.
• Turn the ignition key to the "ON" position (do not start the engine) and check the pressure reading. It should meet manufacturer specifications (typically between 50-60 psi).
• If the pressure is low, inspect the fuel pump, fuel filter, and fuel lines for blockages or failures.

5. Inspect Fuel Injectors

• Tools Required: Fuel injector cleaner, multimeter.
• Check fuel injectors for proper operation using a multimeter to measure resistance.
• If an injector is faulty, replace it with a new one.
• Use fuel injector cleaner to clean the injectors if they are clogged.