how to fix Tesla Model 3 Original (2017-2023) P0302 misfire code

Solution

1. Preparation

• Gather tools and parts for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is on a level surface and secure with wheel chocks.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench, dielectric grease.
• Remove the engine cover (if applicable) to access the spark plugs.
• Using the spark plug socket, carefully remove the spark plug from cylinder 2.
• Inspect the spark plug for signs of wear (e.g., carbon fouling, electrode damage).
• If necessary, replace the spark plug with a new one that meets OEM specifications.
• Apply a small amount of dielectric grease to the spark plug boot to ensure a good seal.
• Torque the new spark plug to the manufacturer's specifications (typically around 15-20 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, ratchet.
• Remove the ignition coil from cylinder 2 by unscrewing the retaining bolts.
• Inspect the ignition coil for cracks or damage.
• If defective, replace the ignition coil with a new OEM or compatible part.
• Reinstall the ignition coil and ensure it is secured properly.

4. Test Fuel Injector

• Tools Required: Fuel injector tester (if applicable).
• Remove the fuel injector from cylinder 2.
• Use a fuel injector tester to check the injector's spray pattern and operation.
• Clean or replace the injector if it is clogged or malfunctioning.

5. Reassemble and Reconnect Battery

• Reinstall any components removed during the repair process.
• Reconnect the negative battery terminal securely.
• Start the vehicle and allow it to idle.