how to fix P0302 code in BMW 5 Series F10/F11 (2010-2017)?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shock.
• Allow the engine to cool before beginning work.

2. Replace Spark Plug

1. Remove the engine cover (if applicable) using a socket set.
2. Disconnect the ignition coil connector for cylinder 2.
3. Unbolt the ignition coil using a socket wrench and gently pull it out.
4. Use a spark plug socket to remove the spark plug from cylinder 2.
5. Inspect the old spark plug for wear and replace with a new spark plug, ensuring the gap is set to manufacturer specifications.
6. Reinstall the ignition coil and reconnect the electrical connector.

3. Replace Ignition Coil (if necessary)

1. If the ignition coil was found defective during inspection, replace it with a new coil.
2. Follow the same steps as in the "Replace Spark Plug" section to remove and install the new ignition coil.

4. Inspect and Clean Fuel Injector (if necessary)

1. Disconnect the fuel injector connector and remove the injector retaining clips.
2. Remove the fuel injector from the intake manifold.
3. Inspect the injector for dirt or clogs, and clean it using a fuel injector cleaner kit if needed.
4. Reinstall the injector and ensure it is seated properly with new O-rings if required.

5. Final Assembly

1. Reattach the engine cover (if applicable).
2. Reconnect the negative battery terminal.
3. Clear any diagnostic trouble codes using the OBD-II scanner.