how to deal with the P0302 misfire code in my Volkswagen Passat B8 (2015-2022)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety during repairs.

2. Replace Spark Plug

• Remove the engine cover if necessary.
• Use a socket wrench to remove the spark plug from cylinder 2.
• Inspect the old spark plug for wear; replace it with a new one that meets manufacturer specifications.
• Torque the new spark plug to the manufacturer's recommended value (typically around 20 Nm).

3. Replace Ignition Coil

• Remove the ignition coil for cylinder 2 by unscrewing it from the cylinder head.
• Disconnect the electrical connector from the ignition coil.
• Install the new ignition coil and reconnect the electrical connector, ensuring it clicks into place.
• Secure the ignition coil with the appropriate torque.

4. Inspect and Replace Fuel Injector

• Remove the fuel rail if necessary to access the fuel injector for cylinder 2.
• Disconnect the electrical connector from the fuel injector and the fuel line (be cautious of fuel spillage).
• Remove the old fuel injector using a suitable tool and replace it with a new injector.
• Reassemble the fuel rail and ensure all connections are secure.

5. Reassemble and Reconnect

• Reconnect the battery terminals.
• Start the engine and let it idle to ensure all components are functioning correctly.