how to fix P0302 misfire code in 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 necessary tools and parts.
• Disconnect the vehicle's high-voltage battery according to manufacturer's safety guidelines.
• Allow the vehicle to cool down before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the engine cover if applicable.
• Locate the spark plug for cylinder 2.
• Using the spark plug socket, remove the spark plug.
• Inspect the spark plug for signs of wear, fouling, or damage.
• If necessary, replace with a new spark plug, ensuring it is gapped according to specifications (usually around 0.040 inches).
• Torque the spark plug to the manufacturer's specification (typically 18-22 lb-ft).

3. Inspect and Replace Ignition Coil

• Tools Required: Socket set, ratchet.
• Locate the ignition coil for cylinder 2.
• Disconnect the electrical connector from the ignition coil.
• Remove the ignition coil mounting bolts.
• Carefully remove the ignition coil from the cylinder head.
• Install a new ignition coil, ensuring it is seated correctly.
• Reattach the electrical connector and secure it.

4. Check Wiring and Connectors

• Inspect the wiring harness leading to the ignition coil and spark plug.
• Look for any signs of fraying, corrosion, or loose connections.
• Repair or replace any damaged wiring or connectors.

5. Compression Test

• Tools Required: Compression tester.
• Remove the spark plug for cylinder 2.
• Insert the compression tester into the spark plug hole.
• Crank the engine a few times to take a reading.
• Compare the reading to the manufacturer's specifications to determine if mechanical issues exist.