my BMW 5 Series F10/F11 (2010-2017) has a P0301 code how to fix it

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool before starting any work.

2. Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket
• Remove the ignition coil from cylinder 1:
  • Unscrew any retaining bolts and gently pull the coil upwards.
• Remove the old spark plug:
  • Use a spark plug socket to unscrew the spark plug from the cylinder head.
• Install the new spark plug:
  • Apply anti-seize compound to the threads if recommended.
  • Torque the spark plug to the manufacturer’s specifications (usually around 15-20 Nm).
• Reinstall the ignition coil and ensure it is seated properly.

3. Replace Ignition Coil

• Tools Required: Socket set, torque wrench
• If the ignition coil was found faulty:
  • Remove the ignition coil from cylinder 1 (as detailed above).
  • Install the new ignition coil.
  • Torque to specifications (usually around 10-15 Nm).

4. Inspect and Clean Fuel Injector

• Tools Required: Injector cleaning kit (optional), safety glasses
• Remove the fuel injector from cylinder 1 if clogged:
  • Disconnect the fuel line and electrical connector.
  • Unscrew the injector mounting bolts and carefully remove the injector.
• Clean the injector with an appropriate cleaning solution or replace it if necessary.
• Reinstall the injector and reconnect the fuel line and electrical connector.

5. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0301 code and reset the check engine light.