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

• Gather necessary tools and parts.
• Ensure the vehicle is in a safe, well-ventilated area.
• Wear appropriate safety gear (gloves, goggles).

2. Inspect High-Voltage Battery Connections

• Sub-steps:
  • Disconnect the high-voltage battery by following the vehicle's service manual instructions.
  • Check all connections for tightness and corrosion. Clean any corroded connections with an appropriate electrical cleaner.
  • Reconnect the high-voltage battery.

3. Inspect Drive Unit Wiring

• Sub-steps:
  • Remove the protective covers to access the wiring of the drive units.
  • Visually inspect the wiring for any frays, breaks, or signs of overheating.
  • Repair or replace any damaged wiring as necessary.

4. Replace Spark Plugs (If Applicable)

• Sub-steps:
  • If the model has conventional spark plugs (some variants do), remove the spark plug cover.
  • Remove the old spark plugs using a spark plug socket.
  • Install new spark plugs, ensuring they are gapped correctly as per manufacturer's specifications.
  • Reattach the spark plug cover.

5. Clear Error Codes

• Sub-steps:
  • Using the OBD-II scanner, clear the P0300 code from the system.
  • Test drive the vehicle to ensure that the code does not return.