how to diagnose a P0302 code on my Tesla Model S Original (2012-2020)?

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

Solution

1. Preparation

• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative terminal of the battery to prevent electrical shocks.
• Gather tools and parts needed for the repairs.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, spark plug socket, pliers.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector for cylinder 2.
• Remove the ignition coil using a socket set. Inspect it for damage or corrosion.
• Remove the spark plug from cylinder 2 using a spark plug socket. Check for wear or fouling.
• Replace the spark plug and ignition coil with new components. Torque the spark plug to the manufacturer's specification (typically 15-20 ft-lbs).
• Reconnect the ignition coil and connector.

3. Check and Replace Fuel Injector

• Tools Required: Injector puller tool, fuel line disconnect tool.
• If the ignition components are in good condition, proceed to the fuel injector.
• Relieve fuel system pressure by using the fuel pump relay to disable the pump.
• Disconnect the fuel lines connected to the injector and remove the injector connector.
• Remove the fuel injector from cylinder 2 using the injector puller tool.
• Inspect the injector for blockage or leakage. Replace if necessary.
• Install the new injector, ensuring it is seated correctly and reconnect the fuel lines.

4. Perform Compression Test

• Tools Required: Compression tester.
• Reconnect the ignition system and fuel systems.
• Remove the spark plug from cylinder 2 again.
• Insert the compression tester into the spark plug hole.
• Crank the engine to obtain a compression reading. It should match the manufacturer’s specifications (typically 150-200 psi).
• If readings are low, further investigation may be necessary for internal engine issues.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0302 code and any other stored codes.
• Start the engine and monitor for any reoccurrence of the misfire code.