how to fix the P0302 misfire code in a Tesla Outback 4th Generation (2010-2014)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the vehicle's battery to prevent electrical shorts.
• Allow the engine to cool down before starting the repair.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, spark plug socket, torque wrench.
• Remove the ignition coil from cylinder 2:
  1. Disconnect the electrical connector from the ignition coil.
  2. Remove the bolts securing the ignition coil and gently pull it out.
• Remove the spark plug:
  1. Using a spark plug socket, unscrew the spark plug from cylinder 2.
  2. Inspect the spark plug for signs of wear or fouling.
• Replace with a new spark plug:
  1. Install the new spark plug and torque it to the manufacturer's specifications (typically around 13-16 ft-lbs).

3. Inspect and Replace Ignition Coil

• If the spark plug appears fine, check the ignition coil:
  1. Use a multimeter to test the coil’s primary and secondary resistance against manufacturer specifications.
  2. If it is out of spec, replace the ignition coil with a new one.
• Reinstall the ignition coil:
  1. Position the new coil and secure it with bolts.
  2. Reconnect the electrical connector.

4. Inspect and Replace Fuel Injector (if necessary)

• If misfires persist after replacing the spark plug and ignition coil:
  1. Remove the fuel injector connector and unscrew the injector from the rail.
  2. Replace it with a new injector, ensuring O-rings are lubricated and properly seated.
  3. Reconnect the fuel injector connector.

5. Clear Codes and Reconnect Battery

• Reconnect the battery and use the OBD-II scanner to clear any trouble codes.
• Start the engine and check for any further misfire codes.