how to fix the P0302 code on my Tesla Model S Plaid/Refresh (2021-present)?

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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the vehicle's battery to prevent electrical shorts.
• Ensure the vehicle is on a level surface and use jack stands if necessary.

2. Inspect and Replace Spark Plug

• Remove Engine Cover: Use a socket set to remove any fasteners securing the engine cover.
• Remove Spark Plug: Use a spark plug socket and ratchet to carefully unscrew and remove the spark plug from cylinder 2.
• Inspect Spark Plug: Check for signs of wear, carbon buildup, or damage. Replace if necessary.
• Install New Spark Plug: Apply a small amount of anti-seize compound on the threads, torque to manufacturer's specifications (usually around 13-15 ft-lbs), and reconnect the ignition coil.

3. Inspect and Replace Ignition Coil

• Remove Ignition Coil: Unscrew the bolts holding the ignition coil in place using a socket set and carefully pull it out.
• Check Coil Functionality: Use a multimeter to measure the resistance. Replace if outside manufacturer specifications (typically 0.5–1.5 ohms).
• Install New Ignition Coil: Position the new coil in place, secure it with bolts, and reconnect wiring harness.

4. Compression Test (if needed)

• Remove Spark Plug: If not done previously, remove the spark plug again to access the cylinder.
• Attach Compression Tester: Screw the compression tester into the spark plug hole.
• Crank Engine: Have an assistant crank the engine while you read the compression gauge.
• Record Values: Compare the values to manufacturer specifications (usually around 180-210 psi). If low, further investigation into mechanical issues is needed.

5. Reconnect Battery and Clear Codes

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