how to fix P0302 misfire code in BMW X5 F15 (2014-2019)

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.
• Ensure the engine is cool before beginning work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket, dielectric grease.
• Remove the ignition coil from cylinder 2 by unscrewing the retaining bolts and disconnecting the electrical connector.
• Remove the spark plug using the spark plug socket; inspect it for wear or damage.
• If the spark plug is worn, replace it with a new one (ensure it matches the specified gap and type for your engine).
• Apply dielectric grease to the new spark plug's threads and reinstall it, tightening to the manufacturer's torque specifications.

3. Inspect and Replace Ignition Coil (if needed)

• If the spark plug was in good condition, inspect the ignition coil for damage.
• If necessary, replace the ignition coil with a new one, ensuring it matches the specifications for the BMW X5 F15.
• Reconnect the ignition coil and secure it with the retaining bolts.

4. Inspect and Replace Fuel Injector (if needed)

• If the ignition components are in good condition, check the fuel injector for cylinder 2.
• Remove the fuel rail (if necessary) to access the injector.
• Replace the fuel injector if it is clogged or malfunctioning, ensuring to replace any O-rings or seals.
• Reinstall the fuel rail and reconnect all fuel lines properly.

5. Reconnect Battery and Clear Codes

• Reconnect the battery and start the engine.
• Use the OBD-II scanner to clear the P0302 code and any other codes.
• Ensure the engine runs smoothly and monitor for any reoccurrence of the misfire.