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

Solution

1. Preparation

• Gather all required tools and parts.
• Disconnect the negative battery terminal to prevent electrical issues during repairs.

2. Replace Spark Plug

• Remove the engine cover if necessary.
• Use a socket wrench to remove the spark plug from cylinder 2.
• Inspect the old spark plug; replace it if it shows signs of wear or damage.
• Install the new spark plug, ensuring it is torqued to specifications (typically around 15 lb-ft).

3. Replace Ignition Coil

• Disconnect the electrical connector from the ignition coil in cylinder 2.
• Remove the retaining bolts and take out the old ignition coil.
• Install the new ignition coil, securing it with the bolts and reconnecting the electrical connector.

4. Clean/Replace Fuel Injector

• If a cleaning service is not sufficient, remove the fuel injector from cylinder 2.
• Inspect O-rings for damage and replace if necessary.
• Install the cleaned or new injector, ensuring it's seated properly.

5. Compression Testing (if required)

• Remove the spark plug and ignition coil from cylinder 2.
• Insert the compression tester into the spark plug hole.
• Crank the engine for a few seconds and note the reading; it should be within manufacturer specifications (generally around 140-200 psi).
• If compression is low, further engine diagnostics may be necessary.

6. Inspect for Vacuum Leaks

• Use a smoke machine or spray carburetor cleaner around intake gaskets and hoses near cylinder 2.
• Listen for changes in engine idle; if a leak is detected, replace the damaged gaskets or hoses.