how to fix P0300 random/multiple cylinder misfire in Tesla Model 3

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and powered off.
• Disconnect the high-voltage battery using proper safety precautions.

2. Update Software

• Connect the vehicle to Wi-Fi.
• Use the Tesla app or vehicle interface to check for any available software updates.
• Follow the prompts to install the updates.

3. Inspect and Clean Connections

• Reconnect the high-voltage battery, ensuring all connections are tight and free of corrosion.
• Use a contact cleaner to clean any connectors that appear dirty or corroded.

4. Check and Replace Components

• If the problem persists, check the inverter and electric motor.
• If any faults are detected, replace the inverter or motor as necessary, using OEM parts.
• Follow manufacturer specifications for torque values and connection procedures.

5. Reconnect and Test

• Reconnect the high-voltage battery and ensure all connectors are secure.
• Start the vehicle and allow it to run until the operating temperature is reached.
• Monitor the vehicle's performance and check for the return of the P0300 code.