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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to prevent electrical shock.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, socket set.
• Sub-steps:
  1. Use a vacuum gauge to check for leaks in the intake system.
  2. Visually inspect all hoses for cracks or loose connections.
  3. Tighten or replace any damaged hoses and gaskets as needed.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver.
• Sub-steps:
  1. Disconnect the MAF sensor electrical connector.
  2. Remove the MAF sensor from the intake duct.
  3. Clean the sensor with MAF cleaner; allow it to dry completely.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge, wrench set.
• Sub-steps:
  1. Connect the fuel pressure gauge to the fuel rail test port.
  2. Turn the ignition key to the ON position without starting the engine.
  3. Check the pressure reading against manufacturer specifications (typically between 50-60 psi).
  4. If pressure is low, inspect the fuel pump and fuel filter for issues.

5. Inspect Fuel Injectors

• Tools Required: Fuel injector cleaner, socket set.
• Sub-steps:
  1. Remove the fuel rail to access the injectors.
  2. Inspect each injector for clogs or leaks.
  3. Clean the injectors with an appropriate cleaner or replace them if necessary.
  4. Reinstall the fuel rail and ensure all connections are secure.

6. Check PCV System

• Tools Required: Basic hand tools.
• Sub-steps:
  1. Inspect the PCV valve and hoses for blockages or damage.
  2. Replace the PCV valve if necessary.
  3. Ensure that all connections are secure and free from leaks.