how to fix P0302 code on my BMW X5 F15 (2014-2019) for misfire?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Ensure the engine is cool before starting work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the ignition coil from cylinder 2 after detaching the electrical connector.
• Unscrew and remove the spark plug using a spark plug socket.
• Inspect the old spark plug for signs of wear or damage.
• Install the new spark plug by hand to avoid cross-threading, then torque to the manufacturer's specification (usually around 18-22 lb-ft).
• Reattach the ignition coil.

3. Replace Ignition Coil (if necessary)

• Tools Required: Socket set.
• If the ignition coil was found to be faulty during diagnostics, remove it from cylinder 2.
• Install the new ignition coil, ensuring it is seated properly.
• Reconnect the electrical connector.

4. Clean or Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector removal tool, safety goggles, shop towels.
• Disconnect the fuel lines and electrical connectors from the fuel injector on cylinder 2.
• Remove the fuel injector using the removal tool.
• Clean the injector with appropriate cleaner or replace it if it's malfunctioning.
• Reinstall the injector, reconnect the fuel lines, and electrical connectors.

5. Reconnect Battery

• Reconnect the battery and ensure all connections are secure.