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

Solution

1. Preparation

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

2. Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the ignition coil connector from cylinder 1.
  3. Unbolt and remove the ignition coil from cylinder 1.
  4. Remove the old spark plug using a spark plug socket and ratchet.
  5. Inspect the spark plug for wear; compare with a new spark plug.
  6. Install the new spark plug and torque to the manufacturer's specifications (usually around 20 Nm).
  7. Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil (if necessary)

• Sub-steps:
  1. If the ignition coil was found faulty during diagnosis, replace it with a new unit.
  2. Follow the same steps as replacing the spark plug to remove and install the ignition coil.

4. Check and Clean Fuel Injector

• Sub-steps:
  1. Disconnect the fuel line and electrical connector from the fuel injector for cylinder 1.
  2. Remove the fuel injector from the fuel rail.
  3. Clean the injector using a suitable fuel injector cleaner.
  4. Reinstall the cleaned or new fuel injector and reconnect the fuel line and electrical connector.

5. Reassemble and Reconnect

• Sub-steps:
  1. Reinstall any removed components or engine covers.
  2. Reconnect the battery.
  3. Clear the error codes using an OBD-II scanner.