how to resolve 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 on a flat surface and the parking brake is engaged.
• Disconnect the negative terminal of the battery to avoid electrical issues.

2. Inspect and Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover (if applicable) to access the spark plugs.
  2. Using a spark plug socket, remove the spark plug from cylinder 1.
  3. Inspect the spark plug for signs of wear, fouling, or damage.
  4. If necessary, replace the spark plug with a new one that meets OEM specifications.
  5. Torque the new spark plug to the specified value (typically around 12-15 lb-ft).

3. Check and Replace Ignition Coil

• Sub-steps:
  1. Disconnect the electrical connector from the ignition coil on cylinder 1.
  2. Remove the ignition coil using the appropriate socket or tool.
  3. Inspect the coil for cracks or signs of overheating.
  4. If faulty, replace with a new ignition coil.
  5. Reconnect the electrical connector securely.

4. Inspect Fuel Injector

• Sub-steps:
  1. Remove any necessary components to access the fuel injector for cylinder 1.
  2. Disconnect the electrical connector from the fuel injector.
  3. Test the injector using a multimeter to ensure it is receiving the correct voltage.
  4. If the injector is faulty, replace it with a new one.
  5. Reconnect all components and ensure there are no leaks.

5. Check for Vacuum Leaks

• Sub-steps:
  1. Inspect all vacuum hoses and connections around the intake manifold for cracks or disconnections.
  2. Use a smoke machine or carburetor cleaner to detect leaks while the engine is running.
  3. Repair or replace any damaged hoses or connections.