how to fix P0301 misfire code in Tesla Model S Plaid/Refresh (2021-present)

Learn how to diagnose and fix P0301 cylinder 1 misfire in Tesla Model S Plaid. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and is powered down.
• Disconnect the negative terminal of the 12V battery for safety.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the engine cover if necessary.
• Locate the spark plug for cylinder 1.
• Use the spark plug socket to remove the existing spark plug.
• Inspect the spark plug for wear or damage (check for carbon build-up or electrode wear).
• If damaged, install a new spark plug with the specified gap (consult the owner's manual for gap specifications).
• Torque the new spark plug to the manufacturer's specifications (typically around 15-20 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Ratchet and socket set.
• Remove the fasteners securing the ignition coil for cylinder 1.
• Carefully pull the ignition coil out of the cylinder head.
• Inspect the coil for cracks or signs of arcing.
• If necessary, replace the ignition coil with a new one, ensuring it is seated properly in the cylinder head.
• Reattach the electrical connector to the ignition coil.

4. Reassemble and Reconnect Battery

• Replace any engine covers that were removed.
• Reconnect the negative terminal of the 12V battery.
• Ensure all tools are removed from the engine compartment.