how to fix P0174 code on my Volkswagen Golf MK7.5 (2020-Present)?

Solution

1. Preparation

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

2. Inspect and Repair Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum hoses for cracks or disconnections.
  2. Use a smoke machine to identify hidden vacuum leaks.
  3. Replace any damaged hoses or gaskets.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner
• Sub-steps:
  1. Disconnect the MAF sensor connector and remove the sensor from the air intake duct.
  2. Spray MAF cleaner onto the sensor elements and allow it to dry.
  3. Reinstall the MAF sensor and reconnect the connector.

4. Check Fuel Pressure

• Tools Required: Fuel pressure gauge
• Sub-steps:
  1. Locate the fuel rail and attach the fuel pressure gauge to the service port.
  2. Turn on the ignition without starting the engine and check the pressure reading.
  3. If the pressure is below specifications, replace the fuel pump or filter as necessary.

5. Inspect and Clean Fuel Injectors

• Tools Required: Fuel injector cleaning kit
• Sub-steps:
  1. Remove the fuel rail with the injectors attached.
  2. Clean the injectors using a fuel injector cleaning kit per manufacturer instructions.
  3. Reinstall the fuel rail and reconnect all lines securely.

6. Check for Exhaust Leaks

• Sub-steps:
  1. Inspect the exhaust manifold and pipe connections for any signs of leaks or damage.
  2. Repair or replace any faulty components.