how to fix P0302 code in Volkswagen Golf MK6 (2009-2014)

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, torque wrench, compression tester, multimeter.
• Ensure the vehicle is parked on a level surface and the engine is off and cool.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if necessary.
  2. Disconnect the ignition coil connector for cylinder 2.
  3. Remove the ignition coil using a socket wrench.
  4. Remove the spark plug using a spark plug socket.
  5. Inspect the spark plug for fouling or wear; replace if necessary.
  6. Install a new spark plug, torquing it to 25 Nm (18 ft-lbs).
  7. Reinstall the ignition coil and reconnect the connector.

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. If the ignition coil was found faulty, remove it as described above.
  2. Install a new ignition coil for cylinder 2, ensuring proper seating.
  3. Reconnect the ignition coil harness.

4. Fuel Injector Inspection

• Sub-steps:
  1. If misfires persist, inspect the fuel injector for cylinder 2.
  2. Remove the fuel rail if needed to access the injector.
  3. Check for fuel flow and inspect the injector for clogs.
  4. Clean or replace the fuel injector as necessary.
  5. Reinstall the fuel rail with new O-rings to prevent leaks.

5. Compression Test

• Sub-steps:
  1. Remove the spark plug for cylinder 2 again.
  2. Insert the compression tester into the spark plug hole.
  3. Crank the engine to take the compression reading.
  4. Compare the reading with specifications (typically 120-200 psi for most engines).
  5. If the compression is low, further investigate potential causes (e.g., valve issues, head gasket leaks).