how to fix P0302 misfire code in Volkswagen Passat B8 (2015-2022)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery negative terminal to prevent electrical shorts.

2. Inspect Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the engine cover if applicable.
• Remove the ignition coil for cylinder 2 by unscrewing the retaining bolts and lifting it out.
• Inspect the spark plug for cylinder 2; remove it using a spark plug socket.
• Check for signs of wear or fouling; replace if necessary.

3. Replace Ignition Coil and Spark Plug (if needed)

• Parts Required: New ignition coil and spark plug (if found faulty)
• Install the new spark plug and torque it to the manufacturer's specification (typically around 22 lb-ft).
• Install the new ignition coil onto cylinder 2 and ensure it clicks into place.
• Reinstall any retaining bolts and the engine cover.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner kit (if cleaning), socket set
• Disconnect the fuel injector connector for cylinder 2.
• Remove the fuel injector using the appropriate socket.
• Inspect the injector for clogs; clean it using a fuel injector cleaner if reusable.
• Reinstall the cleaned or new fuel injector and reconnect the electrical connector.

5. Final Assembly and Testing

• Reconnect the battery negative terminal.
• Start the engine and allow it to idle.
• Monitor for any check engine lights and ensure the misfire code P0302 does not return.