how to fix P0302 code on my Volkswagen Golf MK7 (2015-2019)?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to ensure safety.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, gap gauge
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector.
• Remove the ignition coil bolts and lift out the ignition coil.
• Use a socket to remove the spark plug; inspect for wear and damage.
• Install a new spark plug, ensuring it is gapped to specifications (typically 0.028-0.032 inches).
• Torque the spark plug to manufacturer specifications (usually around 15-20 lb-ft).
• Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil (if needed)

• Tools Required: Socket set
• If the ignition coil is damaged or not functioning, replace it with a new one.
• Remove the old ignition coil and install the new one, ensuring it is seated properly.
• Reconnect the ignition coil connector.

4. Clean or Replace Fuel Injector (if needed)

• Tools Required: Fuel injector cleaning kit or replacement injectors
• Remove the fuel rail if necessary to access the injector.
• Clean the injector using a cleaning kit or replace with a new injector.
• Reinstall the fuel rail and ensure all connections are secure.

5. Address Any Vacuum Leaks

• Tools Required: Vacuum gauge or smoke tester
• Inspect hoses and gaskets for any signs of wear or leaks.
• Replace any damaged hoses or gaskets to ensure a proper seal.

6. Reassemble and Test

• Reinstall the engine cover if it was removed.
• Reconnect the negative battery terminal.
• Start the engine and check for the check engine light.