my Tesla Model S Original (2012-2020) has a P0300 code how do I fix it

Learn how to diagnose and fix P0300 random/multiple cylinder misfire in Tesla Model S. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for repairs.
• Disconnect the negative terminal of the 12V battery to ensure safety while working on electrical components.

2. Inspect and Replace Spark Plugs

• Remove the engine cover to access the spark plugs.
• Use a spark plug socket and ratchet to remove the spark plugs.
• Inspect the spark plugs for wear; replace with OEM specifications if necessary.
  • Torque new spark plugs to manufacturer specifications (typically around 18-22 lb-ft).

3. Check and Replace Ignition Coils

• If any spark plugs show signs of damage, remove the corresponding ignition coils.
• Inspect the ignition coils for cracks or corrosion; replace as needed.
• Reinstall the ignition coils ensuring they are seated correctly.

4. Inspect Vacuum Lines

• Visually inspect all vacuum hoses connected to the intake manifold for cracks or disconnections.
• Replace damaged hoses with OEM parts and ensure all connections are tight.

5. Fuel System Check

• Use a fuel pressure gauge to check fuel pressure at the fuel rail.
• If pressure is below specifications, consider replacing the fuel pump or checking the fuel filter.
• Inspect fuel injectors for clogging or malfunction; clean or replace as needed.

6. Throttle Body Cleaning

• Remove the throttle body from the intake manifold.
• Clean the throttle body using throttle body cleaner and a soft cloth.
• Reinstall the throttle body and ensure all connections are secure.