how to fix P0301 misfire code in Tesla Model 3 Highland (2024-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's battery to ensure safety while working on electrical components.

2. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• Sub-steps:
  1. Remove the engine cover to access the ignition coils.
  2. Disconnect the electrical connector from the ignition coil for cylinder 1.
  3. Unscrew the ignition coil using a socket wrench.
  4. Replace with a new ignition coil, ensuring it is the correct part for the Tesla Model 3 Highland.
  5. Torque the ignition coil to manufacturer's specifications (typically around 10 Nm).
  6. Reconnect the electrical connector.

3. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench
• Sub-steps:
  1. Remove the ignition coil from cylinder 1 to access the spark plug.
  2. Use a spark plug socket to remove the old spark plug.
  3. Inspect the old spark plug for wear or damage; replace if necessary.
  4. Install the new spark plug, ensuring it is gapped correctly (usually around 0.8mm for the Model 3).
  5. Torque the spark plug to the manufacturer's specifications (usually around 20 Nm).
  6. Reinstall the ignition coil.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, cleaning kit
• Sub-steps:
  1. Disconnect the fuel line from the injector carefully.
  2. Remove the fuel injector from cylinder 1.
  3. Clean the injector using a fuel injector cleaning solution or replace it if it’s defective.
  4. Reinstall the cleaned or new fuel injector and reconnect the fuel line.

5. Reassemble and Reconnect Battery

• Reattach any engine covers that were removed.
• Reconnect the vehicle’s battery and ensure all connections are secure.