how to resolve a P0301 misfire code on 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 securely parked.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Ignition Components

• Remove the engine cover (if applicable) to access ignition components.
• Tools Required: Socket set, torque wrench.
• Unscrew and remove the ignition coil from cylinder 1.
  • Sub-steps:
    • Disconnect the electrical connector from the ignition coil.
    • Unscrew the ignition coil using the socket set.
• Inspect the spark plug for wear. Replace if necessary.
  • Sub-steps:
    • Use a spark plug socket to remove the spark plug.
    • Check the gap and condition; replace if damaged.
• Install the new spark plug and ignition coil, ensuring proper torque specifications are followed (typically 15-20 ft-lbs for ignition coils).

3. Fuel Injector Inspection

• Remove and inspect the fuel injector for cylinder 1.
  • Sub-steps:
    • Disconnect the fuel injector electrical connector.
    • Carefully remove the fuel line (use a rag to catch any fuel).
    • Remove the injector using the appropriate tool.
• Clean or replace the fuel injector if clogged.

4. Reassemble and Reconnect

• Reconnect any components that were disconnected during the inspection.
• Ensure all connectors are secure and free of corrosion.
• Reconnect the battery terminal.