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

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.
• Allow the engine to cool before starting work.

2. Inspect and Replace Spark Plug

• Tools Required: Socket set, torque wrench, spark plug socket.
• Remove the engine cover if applicable.
• Disconnect the ignition coil connector for cylinder 2.
• Remove the ignition coil using the socket set.
• Extract the spark plug using the spark plug socket.
• Inspect the spark plug for fouling or excessive wear; replace if necessary.
• Install the new spark plug, ensuring it is torqued to the manufacturer's specifications (typically around 20 Nm).
• Reinstall the ignition coil and reconnect the connector.

3. Check and Replace Ignition Coil (if needed)

• If the ignition coil is suspected to be faulty, replace it.
• Remove the old ignition coil as described above.
• Install the new ignition coil, ensuring it is seated properly.
• Reconnect the ignition coil connector.

4. Inspect and Clean Fuel Injector

• Disconnect the fuel injector connector for cylinder 2.
• Remove the fuel rail if necessary to access the injector.
• Inspect the injector for clogs; clean or replace as needed.
• Reinstall the fuel rail and reconnect the injector connector.

5. Conduct Compression Test

• If misfire persists, perform a compression test on cylinder 2.
• Insert the compression gauge into the spark plug hole.
• Crank the engine several times and note the readings.
• Compare the compression results with manufacturer specifications.