how to fix P0300 code in Tesla Model 3 Highland (2024-present)

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative terminal of the battery for safety.

2. Inspect and Replace Spark Plugs

• Remove engine cover if necessary.
• Use a socket set to remove the spark plug wires or ignition coils.
• Remove the spark plugs using a spark plug socket.
• Inspect each spark plug for excessive wear or deposits and replace if necessary.
• Install new spark plugs, tightening to the manufacturer’s specified torque (typically 15-20 Nm).
• Reattach ignition coils or spark plug wires.

3. Test and Replace Ignition Coils

• Visually inspect ignition coils for cracks or carbon tracking.
• Use a multimeter to test the primary and secondary resistance of the coils.
• Replace any faulty ignition coils with new parts.
• Reinstall ignition coils and ensure they are securely seated.

4. Inspect Fuel Injectors

• Remove the fuel rail if needed to access the injectors.
• Use a fuel pressure gauge to check fuel pressure and ensure it meets specifications.
• Clean or replace any clogged or malfunctioning fuel injectors.
• Reinstall the fuel rail and ensure all connections are secure.

5. Check for Vacuum Leaks

• Inspect all vacuum lines for cracks or disconnections.
• Use a smoke machine or carburetor cleaner to identify any leaks around the intake manifold and connections.
• Replace or repair any damaged vacuum lines.

6. Assess Engine Compression

• Remove spark plugs and perform a compression test on all cylinders.
• Ensure that compression is within the manufacturer's specified range.
• If any cylinder shows low compression, further inspection of valves and piston rings may be necessary.