how to fix a Tesla Outback with a check engine light and code P0301?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface, and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1:
  1. Detach the electrical connector from the ignition coil.
  2. Unbolt the ignition coil using a socket set.
  3. Carefully pull out the ignition coil.
• Inspect the spark plug:
  1. Use a spark plug socket to remove the spark plug.
  2. Check for signs of fouling or excessive wear.
  3. Measure the gap and ensure it adheres to the manufacturer's specifications.
• Replace the spark plug if necessary:
  1. Install a new spark plug hand-tight, then torque to the manufacturer’s specifications (typically around 13 lb-ft).
  2. Reinstall the ignition coil and reconnect the electrical connector.

3. Inspect and Replace Ignition Coil

• If the ignition coil is damaged:
  1. Remove the ignition coil as described above.
  2. Install a new ignition coil in reverse order of removal.
  3. Ensure it seats properly and reconnect the electrical connector.

4. Fuel Injector Testing

• Check the fuel injector for cylinder 1:
  1. Use a multimeter to test the resistance of the fuel injector.
  2. If the resistance is out of specifications, replace the fuel injector.
• If the injector is functioning correctly, ensure it is clean:
  1. Use an injector cleaner or replace it if necessary.

5. Reassemble and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the trouble codes.
• Recheck that all connectors and components are securely fastened.