how to diagnose 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 necessary tools and parts.
• Ensure the vehicle is turned off and parked on a level surface.
• Disconnect the 12V battery for safety.

2. Remove Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench
• Sub-steps:
  1. Locate cylinder 1 spark plug (refer to the service manual for exact location).
  2. Using the spark plug socket, carefully remove the spark plug.
  3. Inspect the spark plug for signs of wear or fouling.

3. Replace Spark Plug (if necessary)

• Tools Required: Torque wrench
• Sub-steps:
  1. Install a new spark plug (ensure it matches specifications).
  2. Torque the spark plug to the manufacturer's specifications (typically around 15-20 Nm).

4. Check and Replace Ignition Coil

• Tools Required: Socket set
• Sub-steps:
  1. Disconnect the electrical connector from the ignition coil.
  2. Remove the ignition coil from cylinder 1.
  3. If faulty, replace with a new ignition coil; reconnect the electrical connector.

5. Inspect and Replace Fuel Injector (if necessary)

• Tools Required: Fuel line disconnect tool, socket set
• Sub-steps:
  1. Disconnect the fuel line from the injector.
  2. Remove the injector from the rail.
  3. Install a new fuel injector if it was found defective.

6. Reassemble and Reconnect Battery

• Ensure all components are securely reinstalled.
• Reconnect the 12V battery.