how to fix P0302 misfire code in Tesla Model S Original (2012-2020)

Learn how to diagnose and fix P0302 cylinder 2 misfire in Tesla Model S (2012-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the negative terminal from the 12V battery to ensure safety.

2. Inspect and Replace Spark Plug

• Remove the engine cover if necessary.
• Locate the spark plug for cylinder 2.
• Using a spark plug socket, carefully remove the spark plug.
  • Tools Required: Spark plug socket, ratchet, and extension.
• Inspect the spark plug for wear or fouling. Replace it if necessary with a new OEM spark plug.
• Torque the new spark plug to the manufacturer’s specifications (usually around 15-20 lb-ft).

3. Inspect and Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil for cylinder 2.
• Remove any retaining bolts and carefully take out the ignition coil.
  • Tools Required: Ratchet and socket set.
• Install the new ignition coil, ensuring it is seated properly and reconnect the electrical connector.

4. Check Fuel Injector

• Access the fuel injector for cylinder 2.
• Disconnect the electrical connector from the injector.
• Use a multimeter to test the injector's resistance; it should match the manufacturer’s specifications.
• If faulty, remove and replace the fuel injector.
  • Tools Required: Injector puller tool (if necessary), ratchet and sockets.
• Reconnect the electrical connector.

5. Reassemble and Reconnect Battery

• Reinstall any components that were removed during the process.
• Reconnect the negative terminal of the battery.
• Start the vehicle and allow it to run for a few minutes.