how to fix P0302 misfire code in Tesla Model 3 Highland (2024-present)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if necessary.
• Disconnect the ignition coil connector from cylinder 2.
• Unscrew and remove the spark plug from cylinder 2.
• Inspect the spark plug for wear or damage; replace if necessary.
• Install the new spark plug and torque to manufacturer specifications (usually around 15-20 ft-lbs).
• Reconnect the ignition coil.

3. Inspect and Replace Ignition Coil

• Disconnect the ignition coil connector for cylinder 2.
• Remove the ignition coil from the cylinder.
• Inspect the ignition coil for any signs of damage or wear.
• If damaged, replace with a new ignition coil.
• Reinstall the ignition coil and reconnect the electrical connector.

4. Check Fuel Injector

• Disconnect the fuel injector connector for cylinder 2.
• Use a noid light to check for signal to the fuel injector.
• If there’s no signal, trace wiring back to the engine control unit.
• If the injector is faulty, replace it with a new one.

5. Inspect for Vacuum Leaks

• Visually inspect all vacuum lines and the intake manifold for cracks or disconnections.
• Use a smoke machine or carburetor cleaner to identify leaks.
• Repair any vacuum leaks found.