how to solve P0301 misfire in my 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 on a flat surface and the parking brake is engaged.
• Disconnect the 12V battery negative terminal to ensure safety while working with electrical components.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable to access the spark plug.
• Use the spark plug socket to remove the spark plug from cylinder 1.
• Inspect the spark plug for wear, carbon build-up, or damage. Replace it if necessary.
• Install the new spark plug, tightening it to the manufacturer's specified torque (usually around 15-20 ft-lbs).
• Reconnect the ignition coil.

3. Inspect and Replace Ignition Coil

• Remove the ignition coil from cylinder 1 after taking off the engine cover if it was removed.
• Check the coil for cracks, corrosion, or other damage.
• If damaged, replace the ignition coil with a new one that matches the specifications.
• Reinstall the ignition coil securely.

4. Check for Vacuum Leaks

• Inspect the intake manifold and related hoses for any cracks or loose connections.
• If any leaks are found, replace the damaged component or re-secure the connection.

5. Verify Electrical Connections

• Inspect all connectors related to the ignition system for corrosion or loose fittings.
• Clean any corroded connectors and ensure they are securely connected.