how to fix P0301 misfire code on 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.
• Disconnect the vehicle battery to ensure safety.
• Allow the engine to cool down before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench.
• Remove the engine cover if applicable.
• Disconnect the ignition coil from the spark plug.
• Remove the spark plug using a spark plug socket.
• Inspect the old spark plug; if damaged or worn, replace it with a new one.
• Install the new spark plug and torque it to the manufacturer's specifications (typically around 20 Nm).
• Reconnect the ignition coil.

3. Replace Ignition Coil

• If the ignition coil for cylinder 1 is faulty, replace it:
• Tools Required: Socket set.
• Remove the ignition coil from cylinder 1.
• Install the new ignition coil and ensure it is seated properly.

4. Clean or Replace Fuel Injector

• If the fuel injector is clogged, clean it using an appropriate cleaning solution or replace it if necessary:
• Tools Required: Fuel injector cleaning kit or replacement injector, socket set.
• Disconnect the fuel line and electrical connector from the fuel injector.
• Remove the fuel injector from the rail.
• Clean or replace the injector, ensuring proper seating and connection.

5. Reassemble and Clear Codes

• Reinstall any components that were removed (engine cover, etc.).
• Reconnect the battery.
• Use the OBD-II scanner to clear any fault codes.