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

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, torque wrench, compression tester, multimeter.
• Disconnect the vehicle's battery to avoid any electrical issues during repairs.

2. Inspect and Replace Spark Plug

1. Locate the spark plug for cylinder 2 (refer to the vehicle's service manual for the exact location).
2. Remove the ignition coil connected to the spark plug by detaching the electrical connector and unscrewing the mounting bolt.
3. Using a socket, carefully remove the spark plug from cylinder 2.
4. Inspect the spark plug for wear, carbon build-up, or damage. Replace it if necessary with a new spark plug that meets OEM specifications.
5. Torque the new spark plug to the specified value (typically around 15-20 lb-ft).
6. Reinstall the ignition coil and reconnect the electrical connector.

3. Test and Replace Ignition Coil (if needed)

1. Use a multimeter to check the resistance of the ignition coil for cylinder 2. Compare with manufacturer's specifications.
2. If the ignition coil is faulty, remove it as described in step 2 and replace it with a new one.
3. Reconnect the ignition coil and ensure it is securely fastened.

4. Check Fuel Injector

1. Inspect the fuel injector for cylinder 2 for any blockages or leaks.
2. If the injector appears dirty, clean it using an appropriate fuel injector cleaner or replace it with a new one if necessary.
3. Ensure proper installation and connections.

5. Reconnect Battery and Clear Codes

1. Reconnect the vehicle's battery.
2. Use the OBD-II scanner to clear the P0302 code from the vehicle's computer.
3. Start the engine and monitor for any reoccurrence of the misfire code.