how to fix P0301 misfire code in Tesla Model 3 Original (2017-2023)

Solution

1. Preparation

• Gather tools and ensure you have the necessary replacement parts.
• Disconnect the vehicle battery to avoid any electrical issues during repair.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench
• Remove the spark plug wire or coil pack from cylinder 1.
• Use the spark plug socket to remove the old spark plug.
• Inspect the new spark plug, ensuring it matches the specifications (gap, type) recommended by Tesla.
• Install the new spark plug and torque it to the manufacturer’s specification (typically around 20 Nm).
• Reattach the spark plug wire or coil pack.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set
• Disconnect the wiring harness from the ignition coil in cylinder 1.
• Remove the mounting bolts securing the ignition coil and take out the old coil.
• Install the new ignition coil and secure it with bolts. Reconnect the wiring harness.

4. Check Fuel Injector (if necessary)

• Tools Required: Fuel line removal tool, socket set
• Relieve fuel system pressure by removing the fuel pump fuse and starting the vehicle until it stalls.
• Disconnect the fuel line from the injector rail.
• Remove the fuel injector from cylinder 1 and inspect for clogs.
• Replace with a new fuel injector if necessary, ensuring proper seating and connection.

5. Reassemble and Test

• Reconnect any components removed during the repair.
• Reconnect the vehicle battery.
• Clear the diagnostic codes using the OBD-II scanner.
• Start the vehicle and monitor for any abnormal noises or issues.