how to fix P0301 misfire code in Tesla Model S Plaid/Refresh (2021-present)

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

• Tools Required: OBD-II scanner, multimeter, Tesla service tool, torque wrench.
• Ensure the vehicle is parked on a level surface and the parking brake is engaged.

2. Inspect High-Voltage Battery

• Disconnect the high-voltage battery following Tesla's safety guidelines.
• Use a multimeter to check voltage levels of the battery pack.
• Reconnect the battery and ensure all connections are secure.

3. Software Update

• Connect the vehicle to a Wi-Fi network.
• Navigate to the software update section in the vehicle's settings.
• Install any available updates that may address the misfire issue.

4. Inspect Electric Motor

• Remove any necessary covers to access the electric motor.
• Visually check for any signs of wear or damage in the motor.
• Perform a motor test using the Tesla service tool to evaluate performance.

5. Repair or Replace Components

• If issues are found with the motor or battery connections, replace the faulty components as needed.
• Ensure all components are torqued to manufacturer specifications during reassembly.

6. Reassemble and Test

• Reinstall all covers and components securely.
• Clear the error codes using the OBD-II scanner.
• Conduct a test drive to ensure normal operation.