what does it mean if my BMW 5 Series F10/F11 (2010-2017) has a P0302 code

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety while working on the electrical components.
• Allow the engine to cool down before starting work.

2. Inspect and Replace Ignition Coil

• Tools Required: Socket set, torque wrench, ratchet, dielectric grease
• Remove the engine cover if necessary to access the ignition coils.
• Disconnect the electrical connector from the ignition coil for cylinder 2.
• Remove the bolt securing the ignition coil using a socket.
• Pull the ignition coil out of the cylinder head.
• Inspect for signs of damage or carbon tracking; replace if necessary.
• Apply a small amount of dielectric grease to the new ignition coil connector.
• Install the new ignition coil in the reverse order of removal.

3. Inspect and Replace Spark Plug

• Tools Required: Spark plug socket, torque wrench
• Remove the ignition coil from cylinder 2 (if not already done).
• Use a spark plug socket to remove the spark plug from cylinder 2.
• Inspect the spark plug for wear or fouling; replace if necessary.
• Gap the new spark plug according to manufacturer specifications (typically 0.028-0.032 inches).
• Install the new spark plug and torque to the manufacturer's specifications (usually around 18 lb-ft).

4. Check Fuel Injector

• Tools Required: Fuel injector cleaner or replacement injector
• If the injector is suspected to be faulty, remove the fuel rail to access the injector for cylinder 2.
• Test the injector for proper operation using a multimeter or by swapping it with a known good injector from another cylinder.
• Clean or replace the fuel injector as necessary.

5. Reassemble and Reconnect

• Reconnect the battery once all repairs are completed.
• Reinstall any engine covers or components that were removed during the repair.