what does code P0302 indicate for my BMW X5 F15 (2014-2019)

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, pliers, dielectric grease
• Remove the engine cover if applicable.
• Disconnect and remove the ignition coil for cylinder 2.
• Inspect the spark plug; if damaged or worn, replace it with a new OEM spark plug.
• Apply dielectric grease to the new spark plug and reinstall it.
• Reinstall the ignition coil and ensure it is seated properly.

3. Inspect and Clean Fuel Injector

• Tools Required: Fuel injector cleaner, small brush, safety goggles
• Disconnect the fuel rail connector and relieve fuel pressure.
• Remove the fuel injector for cylinder 2 from the rail.
• Clean the injector using a fuel injector cleaner and a soft brush.
• Reinstall the cleaned fuel injector and connect the fuel rail.

4. Perform Compression Test

• Tools Required: Compression tester
• Remove the spark plug from cylinder 2.
• Insert the compression tester into the spark plug hole.
• Crank the engine for a few seconds and record the compression reading.
• Compare the reading with the manufacturer's specifications for normal compression.

5. Check for Vacuum Leaks

• Tools Required: Smoke machine or carburetor cleaner
• Use a smoke machine to introduce smoke into the intake system and look for leaks around the intake manifold.
• If using carburetor cleaner, spray around the intake gaskets and listen for changes in engine idle as a sign of leaks.