how to fix P0301 misfire code in Tesla Model S Original (2012-2020)

Learn how to diagnose and fix P0301 cylinder 1 misfire in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts necessary for the repair.
• Disconnect the negative terminal of the battery to prevent electrical shock.
• Allow the vehicle to cool if it has been running.

2. Inspect and Replace the Ignition Coil

• Tools Required: Socket set, ratchet, torque wrench
• Sub-steps:
  1. Remove the engine cover if applicable to access the ignition components.
  2. Disconnect the electrical connector from the ignition coil for cylinder 1.
  3. Remove the bolts securing the ignition coil and gently pull it out.
  4. Install the new ignition coil and secure it with bolts (use the manufacturer's specified torque).
  5. Reconnect the electrical connector.

3. Inspect and Replace the Spark Plug

• Tools Required: Spark plug socket, torque wrench
• Sub-steps:
  1. Remove the ignition coil again if it was replaced.
  2. Use a spark plug socket to remove the spark plug from cylinder 1.
  3. Inspect the old spark plug for wear or damage; replace if necessary.
  4. Install the new spark plug, ensuring it is gapped to the manufacturer's specifications.
  5. Torque the spark plug to the manufacturer's specified value.

4. Check and Replace the Fuel Injector (if necessary)

• Tools Required: Fuel injector puller, socket set
• Sub-steps:
  1. Disconnect the fuel injector electrical connector.
  2. Remove any retaining clips and pull the fuel injector from the rail.
  3. Inspect the fuel injector for clogs or damage; replace if necessary.
  4. Install the new fuel injector and reconnect the electrical connector.

5. Reassemble and Test

• Sub-steps:
  1. Reinstall any components or covers removed during the repair.
  2. Reconnect the negative battery terminal.
  3. Start the engine and let it idle to check for smooth operation.