how to fix P0301 code in BMW 5 Series F10/F11 (2010-2017)?

Solution

1. Preparation

• Gather the necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Allow the engine to cool down before starting work.

2. Inspect and Replace Spark Plug

• Remove the ignition coil from cylinder 1:
  • Use a socket set to unscrew and remove the coil.
• Remove the spark plug:
  • Use a spark plug socket to unscrew and remove the spark plug.
• Inspect the spark plug:
  • Check for signs of wear, carbon buildup, or damage.
• Replace the spark plug if necessary:
  • Use a new spark plug with the correct gap (typically 0.032 inches).

3. Inspect and Replace Ignition Coil

• Inspect the ignition coil for cracks or damage:
  • If any defects are found, replace the ignition coil.
• Install the new ignition coil:
  • Secure it in place and connect the electrical connector.

4. Check and Replace Fuel Injector (if necessary)

• Remove the fuel rail if the injector is inoperable:
  • Disconnect fuel lines and electrical connectors, then remove the rail.
• Replace the faulty fuel injector with a new one:
  • Ensure it is seated properly and reconnect all lines and connectors.

5. Reassemble and Reconnect

• Reinstall any components that were removed such as the fuel rail and ignition coil.
• Reconnect the battery.