how to fix P0300 misfire code in Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Ensure the vehicle is parked on a flat surface and the parking brake is engaged.
• Disconnect the negative terminal of the high-voltage battery for safety.
• Gather all necessary tools and parts.

2. Inspect High-Voltage Connections

• Sub-steps:

  1. Remove any covers protecting the battery and motor connections.
  2. Inspect all high-voltage cable connections for looseness, corrosion, or damage.
  3. Tighten any loose connections to the manufacturer’s torque specifications.

• Tools Required: Socket set, torque wrench.

3. Check and Clean Components

• Sub-steps:

  1. Inspect the electric motor for any debris or contaminants.
  2. Clean any accessible components using a soft brush or compressed air.

• Tools Required: Soft brush, compressed air.

4. Update Software

• Sub-steps:

  1. Connect the vehicle to a Wi-Fi network.
  2. Check for software updates via the vehicle's touchscreen.
  3. Follow on-screen instructions to install any available updates.

• Tools Required: None, but ensure Wi-Fi access.

5. Reconnect Battery

• Sub-steps:

  1. Reconnect the negative terminal of the high-voltage battery.
  2. Start the vehicle and monitor the check engine light.

• Tools Required: None.