what does it mean if my BMW X3 G01 (2018-2024) has a P0302 code?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool down if it has been running.

2. Inspect and Replace Ignition Components

• Tools Required: Socket set, torque wrench, dielectric grease
• Remove the engine cover (if applicable) to access ignition components.
• Disconnect the ignition coil connector for cylinder 2.
• Remove the ignition coil using a socket wrench.
• Inspect the spark plug for cylinder 2; if worn or damaged, replace it.
• Install the new spark plug, ensuring it is torqued to the manufacturer's specifications (typically around 18 lb-ft).
• Apply dielectric grease to the ignition coil connector and reinstall the ignition coil, securing it with the appropriate torque.

3. Check and Replace Fuel Injector

• Tools Required: Fuel line disconnect tool, socket set
• With the engine off, relieve fuel pressure by removing the fuel pump fuse and starting the engine until it stalls.
• Disconnect the fuel injector connector for cylinder 2.
• Remove the fuel rail if necessary, and then remove the injector.
• Inspect the injector for clogs or damage; replace if necessary.
• Reinstall the fuel injector and reconnect the fuel rail.

4. Perform Compression Test

• Tools Required: Compression gauge
• Remove the spark plug for cylinder 2.
• Insert the compression gauge into the spark plug hole.
• Crank the engine a few times and record the compression reading.
• Compare the results against the manufacturer's specifications; if low, further diagnostics are required.