how to fix P0302 misfire code in Tesla Model 3 Highland (2024-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface with the engine off.
• Disconnect the battery to prevent electrical shocks.

2. Remove Ignition Coil and Spark Plug

• Remove the engine cover (if applicable) using a socket set.
• Disconnect the electrical connector from the ignition coil for cylinder 2.
• Unbolt the ignition coil using a socket wrench and remove it from the engine.
• Using a spark plug socket, carefully remove the spark plug from cylinder 2.

3. Inspect and Replace Components

• Inspect the spark plug for wear; replace it if the electrode is worn or damaged (use OEM specifications for replacement).
• Check the ignition coil for signs of cracking or failure; replace it if necessary.
• If applicable, inspect the fuel injector for cylinder 2 and clean or replace it if clogged.

4. Reassemble and Reconnect

• Install the new spark plug and torque it to the manufacturer’s specifications (typically around 15-20 lb-ft).
• Reinstall the ignition coil and torque the mounting bolt to the specified value (usually around 7-10 lb-ft).
• Reconnect the electrical connector to the ignition coil.

5. Reconnect Battery and Clear Codes

• Reconnect the vehicle's battery.
• Use the OBD-II scanner to clear the P0302 code from the system.