how to fix P0174 code in Volkswagen Golf Seventh Generation (2013-2020)

Solution

1. Preparation

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

2. Inspect and Repair Air Intake System

• Tools Required: Socket set, screwdrivers, flashlight.
• Inspect the air intake hoses and connections for cracks or loose fittings.
• If any damaged hoses are found, replace them.
• Ensure all clamps are tight and secure.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner or isopropyl alcohol, soft cloth.
• Remove the MAF sensor from the air intake path.
• Spray the MAF sensor with MAF cleaner and allow it to dry completely before reinstalling.
• If the MAF sensor is damaged, replace it with a new one.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Locate the fuel rail on the engine.
• Connect the fuel pressure gauge to the test port and turn the ignition to the “ON” position (do not start the engine).
• Check the reading against manufacturer specifications (typically around 50-60 psi for the Golf).
• If fuel pressure is low, check the fuel pump and fuel filter for blockages or failure and replace as necessary.

5. Inspect for Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner.
• Use a smoke machine to introduce smoke into the intake system and observe for leaks.
• Alternatively, spray carburetor cleaner around suspected areas while the engine is running and listen for changes in idle.
• Repair any vacuum leaks found.

6. Verify Fuel Injector Operation

• Tools Required: Multimeter, fuel injector tester (optional).
• Disconnect the electrical connector from each injector.
• Use a multimeter to test the resistance of each injector (should be within manufacturer specifications).
• If any injectors are faulty, replace them.