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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.

2. Inspect and Clean Battery Connections

• Locate the high-voltage battery terminals.
• Use a socket set to carefully disconnect the negative terminal first, followed by the positive terminal.
• Inspect the terminals for corrosion; clean with a wire brush and a baking soda solution if necessary.
• Reconnect the positive terminal first, followed by the negative.

3. Check and Replace Ignition Components (if applicable)

• Remove any panel coverings to access ignition coils and spark plugs.
• Use a socket set to unscrew ignition coils and inspect them for damage.
• If any coils are faulty, replace them with new ones.
• Remove spark plugs using a spark plug socket; inspect for wear or fouling and replace if needed.

4. Update Software

• Connect a compatible diagnostic tool to the OBD-II port.
• Check for available software updates from Tesla.
• Follow instructions to update the vehicle’s software if updates are available.