how to fix P0301 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 negative battery terminal to ensure safety.
• Allow the vehicle to cool if the engine has been running.

2. Inspect and Replace Ignition Coil

1. Locate the ignition coil for cylinder 1 (consult service manual for specific location).
2. Remove the engine cover if necessary.
3. Disconnect the electrical connector from the ignition coil.
4. Remove the mounting bolts holding the ignition coil in place using a socket set.
5. Carefully remove the ignition coil from the spark plug.
6. Install a new ignition coil by reversing the removal steps. Torque bolts to manufacturer specifications (consult service manual).

3. Inspect and Replace Spark Plug

1. Using a spark plug socket, remove the spark plug from cylinder 1.
2. Inspect the spark plug for wear or damage (look for carbon buildup or eroded electrode).
3. If worn, install a new spark plug, ensuring it is gapped to the manufacturer's specifications.
4. Torque the spark plug to the specified value (usually around 13-15 lb-ft).

4. Check and Replace Fuel Injector (if necessary)

1. Disconnect the fuel rail connector.
2. Remove any securing bolts to access the fuel injector for cylinder 1.
3. Carefully pull the fuel injector out of the rail.
4. Install a new fuel injector and secure it back in place.
5. Reconnect the fuel rail and ensure there are no leaks.

5. Reconnect Battery and Clear Codes

1. Reconnect the negative battery terminal.
2. Use the OBD-II scanner to clear the P0301 code from the ECU.
3. Perform a test drive to ensure the issue is resolved.