how to resolve P0302 code in BMW 5 Series F10/F11 (2010-2017)

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the engine is off and cool.
• Disconnect the battery to avoid electrical shorts.

2. Replace Spark Plug

• Remove the engine cover, if applicable.
• Use a spark plug socket to remove the spark plug from cylinder 2.
• Inspect the spark plug for wear; replace it with a new one if necessary.
• Torque the new spark plug to the manufacturer’s specifications (typically 20-30 Nm).

3. Test or Replace Ignition Coil

• If the ignition coil is faulty, remove the coil from cylinder 2 by unscrewing it and disconnecting the electrical connector.
• Test the coil using a multimeter (check resistance according to manufacturer specs).
• If defective, replace it with a new ignition coil and ensure it is seated properly.

4. Inspect and Clean or Replace Fuel Injector

• Disconnect the electrical connector and fuel line from the injector in cylinder 2.
• Remove the injector using a fuel injector puller or suitable tool.
• Inspect the injector for clogs; clean it if possible or replace it if necessary.
• Reinstall the injector and reconnect the fuel line and electrical connector.

5. Compression Test (if needed)

• Remove the spark plug from cylinder 2.
• Insert a compression gauge into the spark plug hole.
• Crank the engine and record the compression reading.
• If the compression is low, further mechanical repairs may be required.