how to fix 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

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench, cleaning supplies.
• Disconnect the high-voltage battery by following Tesla's safety procedures to prevent electric shock.

2. Inspect and Replace Spark Plugs

• Remove the engine cover to access the spark plugs.
• Use a socket wrench to remove the spark plugs. Inspect them for wear, carbon build-up, or damage.
• Replace with OEM or high-quality aftermarket spark plugs, ensuring they are gapped correctly according to the manufacturer's specifications (typically around 0.030 inches).
• Torque the spark plugs to the manufacturer's recommended torque specification.

3. Check and Replace Ignition Coils

• Remove the ignition coils from the spark plug wells.
• Inspect each ignition coil for signs of damage or wear.
• Replace any faulty ignition coils with new, OEM-spec parts.
• Reinstall the ignition coils and ensure they are securely connected.

4. Inspect Wiring and Connections

• Visually check the wiring harness and connectors for any signs of wear, corrosion, or loose connections.
• Repair or replace any damaged wiring or connectors as necessary.

5. Clean the Throttle Body

• Remove the throttle body assembly according to Tesla service procedures.
• Clean the throttle body using appropriate throttle body cleaner and a soft cloth.
• Reinstall the throttle body and ensure all connections are tight.