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

Solution

1. Preparation

• Gather tools and parts needed.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery negative terminal to prevent electrical shorts.

2. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench, dielectric grease.
• Remove any covers obstructing access to the ignition coil.
• Disconnect the electrical connector from the ignition coil.
• Remove the bolts securing the ignition coil and carefully lift it out.
• Inspect the coil for cracks or damage; replace if necessary.
• Apply dielectric grease to the connector, then install the new ignition coil.
• Torque the bolts to the manufacturer’s specifications.

3. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, extension, torque wrench.
• Remove the ignition coil as described in the previous step.
• Carefully remove the spark plug using a spark plug socket.
• Inspect the spark plug for wear, carbon build-up, or damage; replace if necessary.
• Install the new spark plug, ensuring it is gapped correctly according to specifications.
• Torque the spark plug to the manufacturer’s specifications.

4. Check Fuel Injector

• Tools Required: Multimeter, fuel injector cleaner (if needed).
• Disconnect the electrical connector from the fuel injector for cylinder 2.
• Use a multimeter to check the resistance of the injector; replace if it is outside the specified range.
• If the injector is functioning, consider cleaning it with a fuel injector cleaner.
• Reconnect the fuel injector electrical connector.

5. Address Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner.
• Visually inspect vacuum hoses near cylinder 2 for cracks or disconnections.
• Use a smoke machine to identify any hidden vacuum leaks; repair as necessary.