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

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal.
• Ensure the vehicle is on a flat surface and secure it with wheel chocks.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, gap tool.
• Remove the engine cover to access the spark plugs.
• Unscrew the spark plug from cylinder 1 using a spark plug socket.
• Inspect the spark plug for wear; replace if necessary.
• Ensure the gap is set to manufacturer specifications (typically around 0.028-0.032 inches).
• Install the new spark plug and torque it to the manufacturer’s specifications (usually around 15-20 ft-lbs).

3. Check and Replace Ignition Coil

• Tools Required: Socket set, torque wrench.
• Remove the ignition coil from cylinder 1 by unscrewing the retaining bolts.
• Inspect the coil for any signs of damage or wear.
• If necessary, replace the ignition coil with a new unit, ensuring it is securely fastened and connected.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, basic hand tools.
• Disconnect the fuel injector connector for cylinder 1.
• Use a fuel injector cleaner to flush the injector if it appears clogged.
• If cleaning does not resolve the issue, replace the fuel injector with a new one, ensuring proper alignment and connection.

5. Perform Compression Test

• Tools Required: Compression tester.
• Remove the spark plug from cylinder 1.
• Insert the compression tester into the spark plug hole.
• Crank the engine and record the compression reading.
• Compare with manufacturer specifications (typically around 180-200 psi). If low, further engine disassembly may be required.