my Volkswagen Golf Eighth Generation (2020-present) has a fluctuating idle speed what's causing this

Solution

1. Preparation

• Gather tools and parts needed.
• Disconnect the battery to ensure safety while working on electrical components.
• Allow the engine to cool before proceeding.

2. Clean Throttle Body

• Remove the air intake duct connected to the throttle body using a socket set.
• Use throttle body cleaner to spray and wipe the throttle body with a clean, lint-free cloth.
• Ensure the throttle plate moves freely and is not sticking.

3. Inspect and Clean IAC Valve

• Locate the IAC valve, usually mounted on or near the throttle body.
• Disconnect the electrical connector and remove the valve using a socket set.
• Clean the valve with an appropriate cleaner and check for any signs of wear.
• Reinstall the IAC valve and reconnect the electrical connector.

4. Replace MAF Sensor (if necessary)

• If the MAF sensor is found to be faulty during testing, disconnect the electrical connector.
• Remove the MAF sensor from the air intake housing.
• Install the new MAF sensor, ensuring it is oriented correctly and secure.
• Reconnect the electrical connector.

5. Reconnect Battery and Test

• Reconnect the vehicle's battery.
• Start the engine and allow it to reach operating temperature while monitoring idle speed for stability.