how to fix P0174 code on Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Inspect and Repair Air Intake System

• Tools Required: Screwdriver set, hose clamps
• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Inspect all intake hoses for cracks or loose connections.
  3. Tighten or replace any damaged hoses.
  4. Check the air filter and replace it if it is dirty or clogged.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver
• Sub-steps:
  1. Locate the MAF sensor in the air intake duct.
  2. Remove the sensor using a screwdriver.
  3. Spray the sensor with MAF cleaner and let it dry completely.
  4. Reinstall the MAF sensor and secure it with screws.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail test port.
  2. Turn the ignition to the "ON" position (without starting the engine) and check if the fuel pressure is within the specified range (typically around 50-60 psi).
  3. If the pressure is low, inspect the fuel pump and fuel filter for issues.
  4. Replace the fuel filter if it is clogged.

5. Inspect Fuel Injectors

• Tools Required: Injector cleaner, multimeter (if testing resistance)
• Sub-steps:
  1. Disconnect the fuel injector connectors.
  2. Use a multimeter to check for proper resistance (typically around 12-16 ohms).
  3. If an injector is faulty, replace it with a new one.
  4. If injectors are clogged, use injector cleaner as per product instructions.