how to fix P0302 misfire code in BMW X5 F15 (2014-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace Spark Plug

• Remove the engine cover (if applicable) to access the spark plug.
• Use a spark plug socket and ratchet to remove the spark plug from cylinder 2.
• Inspect the old spark plug for wear or damage.
• Apply anti-seize compound on the threads of the new spark plug and torque it to the manufacturer’s specification (typically around 18-22 lb-ft).
• Reinstall the ignition coil on top of the new spark plug.

3. Replace Ignition Coil (if necessary)

• Disconnect the electrical connector from the ignition coil.
• Remove the bolt securing the ignition coil using a socket.
• Pull the ignition coil out of the cylinder head carefully.
• Install the new ignition coil by reversing the removal steps. Ensure it clicks into place and reconnect the electrical connector.

4. Test Fuel Injector

• If the ignition components are functioning correctly and the misfire persists, remove the fuel injector from cylinder 2.
• Inspect the injector for clogs or damage; replace if necessary.
• Reinstall the fuel injector and ensure all connections are secure.

5. Reassemble and Reset

• Reinstall any engine covers that were removed.
• Reconnect the battery terminal.
• Clear all DTCs using an OBD-II scanner.