how to fix P0301 misfire code in Tesla Model 3 Highland (2024-present)

Solution

1. Preparation

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

2. Inspect and Replace Spark Plug

• Remove the ignition coil cover if applicable.
• Disconnect the ignition coil connector.
• Unscrew the ignition coil from cylinder 1 using a socket set.
• Remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear (electrode condition and gap).
• If worn, replace with a new spark plug that meets OEM specifications (typically NGK or Bosch).

3. Inspect and Replace Ignition Coil

• After removing the ignition coil, inspect it for cracks or damage.
• If necessary, replace the ignition coil with a new unit that matches OEM specifications.
• Reinstall the ignition coil and secure it with the appropriate torque (typically around 8-10 Nm).

4. Check Fuel Injector

• Remove the fuel rail cover if necessary.
• Disconnect the fuel injector connector for cylinder 1.
• Use a multimeter to check the injector's resistance (should typically be around 12-16 ohms).
• If the injector is faulty, replace it with an OEM-equivalent part.
• Reconnect the fuel injector and ensure it is seated properly in the rail.

5. Reassemble and Test

• Reinstall any components that were removed during the process.
• Reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature.