how to fix P0302 code on Volkswagen Passat B8 (2015-2022) for cylinder 2 misfire?

Solution

1. Preparation

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

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the engine cover if necessary.
• Disconnect the ignition coil connector for cylinder 2.
• Use the spark plug socket to remove the old spark plug.
• Inspect the new spark plug, apply dielectric grease to the boot, and install it.
• Torque the spark plug to the manufacturer's specifications (usually around 20-30 Nm).
• Reconnect the ignition coil connector.

3. Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• Remove the ignition coil for cylinder 2 by unscrewing it from the engine.
• Disconnect the electrical connector from the ignition coil.
• Install the new ignition coil and reconnect the electrical connector.
• Torque the ignition coil screws to the manufacturer's specifications.

4. Clean Fuel Injector

• Tools Required: Fuel injector cleaning kit or spray cleaner.
• Remove the fuel injector for cylinder 2 following vehicle service procedures.
• Use the cleaning kit to clean the injector or replace it if damaged.
• Reinstall the fuel injector and ensure it is seated properly.

5. Check and Repair Vacuum Leaks

• Tools Required: Smoke machine or soapy water solution.
• Visually inspect vacuum hoses around cylinder 2.
• Use a smoke machine to identify any leaks in the intake or vacuum system.
• Repair or replace any damaged hoses or gaskets as needed.