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 battery terminal to avoid electrical shocks.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug gap tool
• Remove the engine cover if necessary.
• Unscrew the spark plug from cylinder 1 using the socket.
• Inspect the old spark plug for wear; if it appears damaged, replace it with a new spark plug.
• Gap the new spark plug to the manufacturer specifications (typically around 0.028-0.032 inches for Tesla).
• Install the new spark plug and torque it to the specified value (usually around 15-20 lb-ft).
• Reinstall the engine cover if it was removed.

3. Replace Ignition Coil

• Tools Required: Socket set, ratchet
• Remove the ignition coil connector by pressing down on the tab and pulling it off.
• Remove the bolts securing the ignition coil and pull the coil out.
• Install the new ignition coil, ensuring it is seated properly.
• Reattach the ignition coil connector, ensuring it clicks into place.

4. Check Fuel Injector

• Tools Required: Fuel pressure gauge, injector cleaning kit (if cleaning is needed)
• Disconnect the fuel injector connector from cylinder 1.
• Use the fuel pressure gauge to check for proper fuel pressure.
• If necessary, clean or replace the fuel injector.

5. Reconnect Battery and Clear Code

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0301 code from the vehicle's system.