how to fix P0302 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.
• Disconnect the high-voltage battery to ensure safety during repairs.
• Allow the engine to cool down.

2. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench, dielectric grease.
• Remove the engine cover if necessary to access the ignition coils.
• Disconnect the electrical connector from the ignition coil in cylinder 2.
• Remove the bolt securing the ignition coil and gently pull the coil out.
• Inspect the coil for signs of damage (cracks, burnt areas).
• Replace with new ignition coil if needed. Apply dielectric grease to the connector before reinstallation.
• Reinstall the ignition coil and secure it with the bolt.

3. Inspect and Replace Spark Plug

• Remove the ignition coil again if it was replaced.
• Use a spark plug socket to remove the spark plug from cylinder 2.
• Inspect the spark plug for wear, carbon buildup, or damage.
• Replace with a new spark plug if required. Ensure it is gapped correctly according to manufacturer specifications.
• Reinstall the spark plug, torqueing it to the specified value (typically around 15-20 lb-ft).

4. Check Fuel Injector

• If the ignition components are functioning correctly, inspect the fuel injector for cylinder 2.
• Disconnect the fuel injector connector and use a multimeter to check for proper resistance (typically around 12-16 ohms).
• If the injector is faulty, replace it with a new one.
• Reconnect the fuel injector and ensure all connections are secure.

5. Final Steps

• Reconnect the high-voltage battery.
• Clear the error codes using the OBD-II scanner.
• Start the vehicle to check for proper operation.