my Tesla Model S Original (2012-2020) has a P0300 code, what's causing it?

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 equipment.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool if it has been running.

2. Inspect Spark Plugs

• Remove the engine cover if applicable.
• Use a spark plug socket to carefully remove the spark plugs.
• Inspect the spark plugs for wear, carbon buildup, or damage.
• Replace any faulty spark plugs with OEM or high-quality aftermarket replacements.
• Torque the new spark plugs to the manufacturer’s specifications (typically around 13-20 lb-ft).

3. Check Ignition Coils

• Disconnect the ignition coil connectors.
• Remove the ignition coils using an appropriate socket.
• Inspect each coil for physical damage or corrosion.
• Test each ignition coil with a multimeter to verify resistance; replace any that do not meet specifications.
• Reinstall the ignition coils and reconnect the connectors.

4. Inspect for Vacuum Leaks

• Visually check all vacuum hoses and the intake manifold for cracks or disconnections.
• If necessary, use a smoke machine to detect leaks.
• Replace any damaged hoses or gaskets as needed.

5. Fuel Pressure Test

• Connect a fuel pressure gauge to the fuel rail.
• Turn on the ignition without starting the engine to check for proper fuel pressure.
• If pressure is low, inspect the fuel pump and fuel filter, replacing them if necessary.

6. Clean or Replace MAF Sensor

• Disconnect the MAF sensor connector.
• Remove the sensor from the intake tract.
• Clean the MAF sensor with MAF cleaner and allow it to dry.
• If cleaning does not resolve issues, replace the MAF sensor with a new one.