how to address P0306 misfire code in Tesla Model S Plaid/Refresh (2021-present)?

Learn how to diagnose and fix P0306 cylinder 6 misfire in Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the negative terminal of the battery to ensure safety.
• Allow the vehicle to cool down before starting work.

2. Replace Ignition Coil

• Tools Required: Socket set, ratchet, torque wrench.
• Steps:
  1. Remove the engine cover if applicable.
  2. Unplug the electrical connector from the ignition coil for cylinder 6.
  3. Unbolt and remove the ignition coil from cylinder 6.
  4. Install the new ignition coil and torque the bolts to the manufacturer’s specifications (typically around 7-10 Nm).
  5. Reconnect the electrical connector.

3. Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench, anti-seize compound.
• Steps:
  1. Use a spark plug socket to remove the spark plug from cylinder 6.
  2. Inspect the old spark plug for signs of wear or damage.
  3. Apply a small amount of anti-seize compound to the threads of the new spark plug.
  4. Install the new spark plug and torque it to the manufacturer’s specifications (usually around 25 Nm).

4. Inspect and Test Fuel Injector

• Tools Required: Noid light or multimeter.
• Steps:
  1. Disconnect the fuel injector connector for cylinder 6.
  2. Use a noid light to check for signal or a multimeter to measure resistance. Ensure it falls within manufacturer specifications (typically around 12-14 ohms).
  3. Replace the fuel injector if it is not functioning properly.

5. Reassemble and Test

• Reattach the engine cover if removed.
• Reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature.