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

Solution

1. Preparation

• Gather tools and parts necessary for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before working on it.

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; a reading outside of the normal range indicates a leak.
  2. Visually inspect all vacuum hoses and connections for cracks or disconnections.
  3. Replace any damaged hoses or gaskets as needed.

3. Clean or Replace MAF Sensor

• Tools Required: MAF cleaner spray, socket set.
• Sub-steps:
  1. Disconnect the MAF sensor electrical connector.
  2. Remove the MAF sensor from the intake duct.
  3. Clean the sensor using MAF cleaner spray; let it dry completely.
  4. Reinstall the MAF sensor and reconnect the electrical connector.

4. Check and Adjust Fuel Pressure

• Tools Required: Fuel pressure gauge.
• Sub-steps:
  1. Locate the fuel rail and connect the fuel pressure gauge.
  2. Turn the ignition key to the "on" position without starting the engine to check the pressure.
  3. Compare the reading to manufacturer specifications; replace the fuel pump or filter if pressure is low.

5. Inspect Fuel Injectors

• Tools Required: Fuel injector cleaning kit or replacement injectors, socket set.
• Sub-steps:
  1. Remove the fuel rail to access the fuel injectors.
  2. Inspect each injector for clogs or leaks.
  3. Clean the injectors with a cleaning kit or replace them if necessary.