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

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• 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 ignition coil from cylinder 2.
• Use the spark plug socket to remove the spark plug. Inspect for wear or damage (cracks, carbon buildup).
• If needed, replace with a new spark plug of the correct specification (check manufacturer recommendations for gap and type).
• Torque the new spark plug to the manufacturer’s specification (typically around 20 Nm).

3. Inspect and Replace Ignition Coil

• Reinstall the ignition coil if the spark plug was in good condition. If not:
• Remove the ignition coil from cylinder 2.
• Replace it with a new ignition coil that matches the vehicle's specifications.
• Ensure proper seating and connection of the coil connector.

4. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaning kit (if needed).
• If the fuel injector is suspected, remove it from cylinder 2.
• Clean the injector using a fuel injector cleaning kit or replace it if it appears damaged.
• Reinstall the injector and ensure it is securely connected.

5. Check for Vacuum Leaks

• Visually inspect all hoses connected to the intake manifold for cracks or loose connections.
• Use a smoke machine or carb cleaner method to find any vacuum leaks.
• Repair or replace any damaged hoses or seals found during inspection.

6. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0302 code and any other related codes.