how to fix a P0301 misfire code on my Tesla Model 3 Highland (2024-present)

Solution

1. Preparation

• Gather required tools and parts.
• Disconnect the vehicle's battery to ensure safety.
• Allow the engine to cool down before beginning work.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the ignition coil from the spark plug.
  3. Remove the spark plug using a spark plug socket wrench.
  4. Inspect the spark plug for wear; replace it if necessary with a new one.
  5. Torque the new spark plug to the manufacturer’s specifications (typically around 13-16 lb-ft).

3. Inspect and Replace Ignition Coil

• Sub-steps:
  1. Disconnect the electrical connector from the ignition coil.
  2. Remove the ignition coil from the cylinder head.
  3. Install the new ignition coil ensuring it is seated properly.
  4. Reconnect the electrical connector to the new ignition coil.

4. Inspect Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector electrical connector and fuel line (ensure proper precautions to avoid fuel spillage).
  2. Remove the fuel injector from the cylinder head.
  3. Clean the injector and test it for proper functionality or replace it if necessary.
  4. Reinstall the fuel injector and reconnect the electrical connector and fuel line.

5. Reconnect Battery and Clear Codes

• Reconnect the vehicle’s battery.
• Use the OBD-II scanner to clear the P0301 code from the vehicle’s computer.