how to diagnose P0300 code in Tesla Model S Original (2012-2020)

Learn how to diagnose and fix P0300 engine misfire in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a flat surface and the parking brake is engaged.
• Disconnect the negative terminal of the 12V battery for safety.

2. Inspect and Replace Spark Plugs

• Sub-steps:
  1. Remove the engine cover (if applicable) to access the spark plugs.
  2. Use a socket and ratchet to remove each spark plug.
  3. Inspect the spark plugs for wear; replace if they are worn or fouled.
  4. Install new spark plugs, tightening to the manufacturer's specified torque (typically around 13-15 ft-lbs).

3. Check and Replace Ignition Coils

• Sub-steps:
  1. Disconnect the electrical connectors from each ignition coil.
  2. Remove the bolts securing the ignition coils using a socket.
  3. Lift the coils out and inspect for cracks or damage.
  4. Replace any faulty ignition coils with new ones, and reconnect the electrical connectors.

4. Inspect and Clean Fuel Injectors

• Sub-steps:
  1. Disconnect the fuel injector connectors.
  2. Remove the fuel rail (carefully release fuel pressure first).
  3. Inspect the fuel injectors for clogs or leaks.
  4. Clean or replace the injectors as necessary before reinstalling them.

5. Address Vacuum Leaks

• Sub-steps:
  1. Visually inspect all vacuum hoses connected to the intake manifold.
  2. Replace any damaged or cracked hoses.
  3. Check the intake manifold gasket for leaks and replace if necessary.

6. Compression Test

• Sub-steps:
  1. Remove spark plugs for easier access to cylinders.
  2. Insert a compression gauge into each cylinder.
  3. Crank the engine and record the compression readings.
  4. Compare results to manufacturer specifications; replace components as needed if readings are low.