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

Solution

1. Preparation

• Gather the necessary tools and parts.
• Disconnect the battery to ensure safety during repairs.
• Allow the engine to cool completely before starting work.

2. Replace Spark Plug

• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Disconnect the ignition coil connector for cylinder 2.
  3. Unscrew the ignition coil from cylinder 2 and remove it.
  4. Remove the old spark plug using a spark plug socket and ratchet.
  5. Inspect the spark plug gap and condition; replace it with a new spark plug if necessary.
  6. Reinstall the spark plug and torque it to the manufacturer's specifications (typically around 20 Nm).
  7. Reinstall the ignition coil and reconnect the connector.

3. Replace Ignition Coil (if necessary)

• Sub-steps:
  1. If the misfire persists after replacing the spark plug, proceed to replace the ignition coil.
  2. Remove the faulty coil and install a new one, ensuring proper seating.
  3. Reconnect the ignition coil connector.

4. Clean or Replace Fuel Injector (if necessary)

• Sub-steps:
  1. If the injector is suspected to be faulty, disconnect the fuel injector connector.
  2. Remove the fuel rail if needed to access the injector.
  3. Clean the injector using a cleaning kit or replace it with a new one.
  4. Reinstall the fuel rail and reconnect the fuel injector connector.

5. Perform Compression Test (if necessary)

• Sub-steps:
  1. Remove the spark plug from cylinder 2.
  2. Insert a compression gauge into the spark plug hole.
  3. Crank the engine to measure the compression, ensuring to follow the manufacturer's specifications.
  4. If compression is low, investigate further for mechanical issues.