how to resolve P0302 misfire code in my Volkswagen Golf MK7 (2015-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• 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 Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench, ratchet, gap gauge.
• Remove the ignition coil from cylinder 2.
• Remove the spark plug using the spark plug socket.
• Inspect the spark plug for damage or excessive wear; replace if necessary.
• Clean the spark plug hole to ensure no debris falls into the cylinder.
• Install the new spark plug, ensuring it is gapped correctly (0.028-0.032 inches).
• Torque the spark plug to the manufacturer's specification (usually around 20 Nm).

3. Inspect and Replace Ignition Coil

• Tools Required: 10mm socket and ratchet.
• Remove the ignition coil from cylinder 2.
• Inspect the ignition coil for cracks or damage.
• If faulty, replace it with a new ignition coil.
• Reinstall the ignition coil securely.

4. Check and Clean Fuel Injector

• Tools Required: Fuel injector cleaning kit (if cleaning), 12mm socket.
• Remove the fuel injector from cylinder 2.
• Inspect the injector for clogs; clean it using a fuel injector cleaning kit if necessary.
• Reinstall the fuel injector ensuring it is properly seated.

5. Reassemble and Test

• Reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature.
• Monitor for any check engine lights or misfire symptoms.