how to fix P0301 code on BMW 5 Series F10/F11 (2010-2017) misfire issues

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety while working on electrical components.

2. Replace Spark Plug

• Remove the engine cover if necessary.
• Locate the spark plug for cylinder 1.
• Use a spark plug socket to remove the old spark plug.
• Inspect the spark plug socket for debris and clean if necessary.
• Install the new spark plug (use OEM specifications for torque, typically 12-15 Nm).
• Reattach the spark plug wire or ignition coil.

3. Replace Ignition Coil (if necessary)

• If the ignition coil is suspected to be faulty, remove the connector and the mounting screw.
• Carefully pull the ignition coil out of the cylinder head.
• Install the new ignition coil and secure it with the mounting screw.
• Reconnect the electrical connector.

4. Inspect and Clean Fuel Injector

• Remove the fuel rail cover if applicable.
• Disconnect the fuel injector connector for cylinder 1.
• Use a fuel line disconnect tool to safely detach the fuel line from the injector.
• Remove the fuel injector and inspect for clogs or damage.
• Clean the injector using a professional fuel injector cleaner or replace it if necessary.
• Reinstall the injector and reconnect all components.

5. Reassemble and Test

• Reattach any engine covers that were removed.
• Reconnect the battery.
• Start the engine and allow it to idle for a few minutes to ensure proper operation.