my Volkswagen Golf Eighth Generation (2020-present) is stalling when I stop, what could be wrong

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down before starting work.

2. Clean or Replace the Throttle Body

• Remove the air intake duct connected to the throttle body using a socket set.
• Clean the throttle body with throttle body cleaner and a soft cloth, ensuring all carbon deposits are removed.
• If necessary, replace the throttle body with a new one, following the manufacturer's specifications for torque values during reinstallation.

3. Inspect and Test the Idle Air Control Valve

• Locate the IAC valve, usually found on the throttle body.
• Disconnect the electrical connector and remove the IAC valve using a socket set.
• Clean the valve or replace it if it is faulty.
• Reinstall the IAC valve, ensuring it is torqued to the manufacturer's specifications.

4. Check and Replace Fuel Filter (if applicable)

• Locate the fuel filter (if serviceable) and relieve fuel system pressure.
• Disconnect the fuel lines carefully, using appropriate safety measures.
• Replace the old fuel filter with a new one, ensuring proper orientation and connections.
• Reconnect the fuel lines and check for leaks.

5. Test the Mass Airflow Sensor

• Disconnect the MAF sensor and clean it using MAF cleaner.
• Reconnect the MAF sensor and ensure it is seated properly.
• If necessary, replace the MAF sensor if cleaning does not resolve the issue.