my Volkswagen Golf MK6 (2009-2014) has a check engine light and code P0302

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative battery terminal to avoid electrical shorts.
• Allow the engine to cool down before starting work.

2. Inspect Ignition System

• Tools Required: Socket set, torque wrench, spark plug socket
  1. Remove the engine cover (if applicable) using a socket set.
  2. Remove the ignition coil from cylinder 2 by unscrewing the bolts and disconnecting the electrical connector.
  3. Inspect the coil for cracks or damage; replace if necessary.
  4. Remove the spark plug from cylinder 2 using a spark plug socket. Inspect for wear or carbon buildup; replace if necessary.
  5. Reinstall the new spark plug, torqueing to the manufacturer's specification (usually around 20-25 Nm).

3. Check Fuel Injector

• Tools Required: Noid light or multimeter
  1. Disconnect the fuel injector connector from cylinder 2.
  2. Connect the noid light or multimeter to the fuel injector connector and crank the engine to check for a signal.
  3. If there is no signal, inspect the wiring and connectors for damage. Repair or replace as needed.
  4. If the injector is faulty, remove it and install a new fuel injector.

4. Perform Compression Test

• Tools Required: Compression tester
  1. Remove the spark plug from cylinder 2 (if not already done).
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine a few times and record the compression reading.
  4. Compare the reading to the manufacturer's specifications. If low, further investigation is needed for internal engine issues.

5. Reassemble and Reconnect

• Reinstall the ignition coil, ensuring proper connection.
• Reconnect the negative battery terminal.
• Start the engine and allow it to idle.