how to fix Tesla Model 3 Original (2017-2023) misfire code P0300

Solution

1. Preparation

• Gather required tools and parts.
• Ensure the vehicle is on a level surface and engine is cool.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Spark Plugs

• Remove the engine cover if applicable.
• Using a spark plug socket, carefully remove the spark plugs.
• Inspect the spark plugs for signs of wear or fouling; replace with OEM parts if necessary.
• Torque the new spark plugs to the manufacturer's specifications (usually around 13-15 lb-ft).

3. Inspect and Replace Ignition Coils

• Remove any obstructions to access the ignition coils.
• Disconnect the electrical connector and remove the ignition coil using a socket.
• Inspect for cracks or damage; replace if faulty.
• Reinstall the new ignition coil, ensuring it is seated properly and reconnect the electrical connector.

4. Check and Clean Fuel Injectors

• Remove the fuel rail to access the fuel injectors (ensure fuel pressure is relieved).
• Inspect the fuel injectors for clogs or leaks.
• Clean the injectors using an appropriate fuel injector cleaner or replace them if necessary.
• Reinstall the fuel rail, ensuring all connections are secure.

5. Inspect for Vacuum Leaks

• Visually inspect all vacuum lines for cracks or disconnections.
• Use a smoke machine or a spray of carburetor cleaner to detect leaks while the engine is running.
• Repair or replace any damaged vacuum lines.

6. Perform Engine Compression Test

• Remove all spark plugs and use a compression gauge.
• Crank the engine to measure the compression on each cylinder.
• Compare readings to manufacturer specifications; low compression may indicate internal engine issues.