what should I do if my Tesla Model S Plaid/Refresh (2021-present) has a P0301 misfire code

Learn how to diagnose and fix P0301 cylinder 1 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 vehicle's 12V battery to ensure safety while working on electrical components.
• Allow the vehicle to cool down if it has been running.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover (if applicable) using a socket set.
  2. Disconnect the ignition coil connector for cylinder 1.
  3. Remove the ignition coil using a ratchet and socket.
  4. Extract the spark plug using a spark plug socket.
  5. Inspect the spark plug for wear or damage; replace it if necessary.
  6. Install the new spark plug, tightening it to the manufacturer’s specified torque (usually around 15 lb-ft).

Tools Required:

• Socket set
• Torque wrench
• Spark plug socket

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. If the ignition coil appears faulty, replace it with a new one.
  2. Reinstall the ignition coil over the new spark plug.
  3. Reconnect the ignition coil connector securely.

4. Check Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector.
  2. Remove the fuel injector using the appropriate tools.
  3. Clean the injector using a specialized cleaner or replace it if necessary.
  4. Reinstall the fuel injector and reconnect the connector.

5. Reconnect Battery and Clear Codes

• Reconnect the 12V battery.
• Use the OBD-II scanner to clear the P0301 code from the system.