how to address the P0302 code in my BMW 5 Series G30/G31 (2017-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Allow the engine to cool completely before commencing repairs.

2. Replace Spark Plug

• Tools Required: Spark plug socket, ratchet, torque wrench.
• Remove the coil pack for cylinder 2:
  1. Disconnect the electrical connector from the ignition coil.
  2. Unbolt the coil pack and gently pull it out.
• Remove the spark plug:
  1. Use the spark plug socket to unscrew the spark plug from the cylinder head.
  2. Inspect the old spark plug for signs of wear (e.g., fouling, damage).
• Install the new spark plug:
  1. Apply a small amount of anti-seize compound to the threads of the new spark plug.
  2. Screw the new spark plug into the cylinder head and torque to the manufacturer’s specifications (typically around 18 lb-ft for BMW).
• Reinstall the ignition coil pack for cylinder 2.

3. Replace Ignition Coil (if necessary)

• Tools Required: Ratchet, socket set.
• If the ignition coil was found faulty during diagnostics:
  1. Remove the coil pack as described in the previous step.
  2. Install the new ignition coil.
  3. Reconnect the electrical connector securely.

4. Clean or Replace Fuel Injector (if necessary)

• Tools Required: Fuel injector removal tool, fuel line tools.
• If the fuel injector is clogged:
  1. Disconnect the fuel line and electrical connector from the injector.
  2. Remove the injector using the appropriate tool.
  3. Clean the injector with a suitable cleaner or replace it with a new one.
  4. Reinstall the injector and reconnect the fuel line and electrical connection.