how to fix the P0300 code on my Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Ensure the vehicle is in a safe, flat location.
• Disconnect the battery to avoid electrical shock.
• Gather all necessary tools and parts.

2. Inspect and Replace Spark Plugs (if applicable)

• Remove any engine covers or components blocking access to the spark plugs.
• Using a socket set, carefully unscrew and remove the spark plugs.
• Inspect the spark plugs for wear; if they show signs of damage or excessive wear, replace with OEM or quality equivalent spark plugs.
• Install the new spark plugs, ensuring they are torqued to the manufacturer's specifications (typically around 13 lb-ft).
• Reinstall any covers or components removed for access.

3. Inspect and Replace Ignition Coils (if applicable)

• Disconnect the wiring harness from each ignition coil.
• Remove the ignition coils by unscrewing them from the engine.
• Inspect for any signs of cracking or damage.
• Replace any faulty coils with new, OEM-standard ignition coils.
• Reinstall the ignition coils and reconnect the wiring harness.

4. Clear Codes and Test Drive

• Reconnect the battery and use the OBD-II scanner to clear the P0300 code.
• Start the vehicle and allow it to reach operating temperature.
• Perform a test drive to ensure the check engine light does not return and that the vehicle operates smoothly.