how to fix P0174 code in Volkswagen Golf Eighth Generation (2020-present)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Vacuum Leaks

• Tools Required: Vacuum gauge, hose clamps, RTV silicone sealant.
  • Use a vacuum gauge to check for low vacuum readings.
  • Inspect all vacuum lines and intake manifold gaskets for wear or damage.
  • Replace any cracked or damaged hoses.
  • Apply RTV silicone sealant to seal any minor leaks in the intake manifold gasket.

3. Clean or Replace MAF Sensor

• Tools Required: MAF sensor cleaner, screwdriver set.
  • Disconnect the electrical connector from the MAF sensor.
  • Remove the MAF sensor using a screwdriver.
  • Clean the MAF sensor with MAF cleaner spray, avoiding contact with the sensor element.
  • If the sensor is damaged, replace it with a new one and reconnect the wiring.

4. Check Fuel Delivery

• Tools Required: Fuel pressure gauge, socket set.
  • Locate the fuel rail and connect the fuel pressure gauge.
  • Turn the ignition key to the "ON" position (without starting the engine) and check fuel pressure.
  • If pressure is low, inspect the fuel pump and replace it if necessary.
  • Also, consider replacing the fuel filter if it is clogged.