how to fix the P0302 misfire code on Volkswagen Golf Eighth Generation (2020-present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• 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 ignition coil from cylinder 2 by unbolting it and disconnecting the electrical connector.
• Unscrew the spark plug using a spark plug socket.
• Inspect the old spark plug for wear or damage and compare it to a new one.
• Install the new spark plug by hand to avoid cross-threading, then torque to manufacturer specifications (typically around 22 lb-ft).
• Apply dielectric grease to the ignition coil boot before reinstallation.

3. Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• If the ignition coil was found defective during inspection, remove it from cylinder 2.
• Install the new ignition coil, ensuring it is seated properly, and torque bolts to manufacturer specifications.
• Reconnect the electrical connector.

4. Inspect and Replace Fuel Injector (if necessary)

• Tools Required: Socket set, fuel injector puller (if needed)
• Remove the fuel rail according to the manufacturer’s procedure to access the fuel injector for cylinder 2.
• Inspect the injector for clogs or leaks; replace it if necessary.
• Reinstall the fuel rail and ensure all connections are secure.

5. Check for Vacuum Leaks

• Inspect all hoses connected to the intake manifold for cracks or disconnections.
• Use a smoke machine or carburetor cleaner around the intake manifold to identify any leaks.
• Repair or replace any damaged hoses or components.