how to fix the P0302 code misfire on my Volkswagen Golf MK6 (2009-2014)?

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the battery to ensure safety while working on electrical components.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the ignition coil from cylinder 2:
  1. Unplug the electrical connector from the ignition coil.
  2. Remove the bolts securing the ignition coil and lift it out.
• Remove the spark plug:
  1. Using a spark plug socket, carefully unscrew the old spark plug from cylinder 2.
  2. Inspect the old spark plug for signs of wear or fouling.
• Install the new spark plug:
  1. Apply anti-seize compound (if not pre-applied) to the threads of the new spark plug.
  2. Hand-tighten the new plug in, then torque it to the manufacturer's specification (typically around 22 lb-ft).
• Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set, torque wrench.
• If the ignition coil is found defective:
  1. Remove the ignition coil from cylinder 2 (as described above).
  2. Install the new ignition coil in reverse order of removal and torque to manufacturer’s specifications.

4. Inspect/Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector puller, socket set, torque wrench.
• If the fuel injector is faulty:
  1. Disconnect the fuel injector connector.
  2. Remove any retaining clips and unbolt the injector from the rail.
  3. Install the new injector, ensuring proper O-ring placement, and reconnect the electrical connector.

5. Check for Vacuum Leaks

• Visually inspect all vacuum hoses and the intake manifold for cracks or disconnections.
• Use a smoke machine or carburetor cleaner to check for leaks while the engine is running.