why does my BMW X3 G01 (2018-2024) check engine light keep flashing

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to ensure safety while working on electrical components.

2. Address Ignition System

• Spark Plug Replacement

  1. Remove the ignition coils by unscrewing the bolts.
  2. Extract the spark plugs using a spark plug socket.
  3. Install new spark plugs, ensuring they are gapped correctly (typically 0.028 inches for BMW).
  4. Reattach the ignition coils.

• Ignition Coil Replacement (if necessary)

  1. If any coils are found defective during the inspection, replace them by securing new coils in place and reconnecting electrical connectors.

3. Clean Fuel Injectors

• Fuel Injector Cleaning
  1. Remove the fuel rail by loosening bolts and disconnecting fuel lines (ensure to relieve fuel pressure first).
  2. Use a fuel injector cleaning kit and follow the instructions to clean each injector.
  3. Reassemble the fuel rail and ensure all connections are secure.

4. Inspect and Repair Vacuum Leaks

• Vacuum Line Inspection
  1. Visually inspect all vacuum lines for cracks or disconnections.
  2. Replace any damaged lines with OEM parts.

5. Test and Clear Codes

• After repairs, reconnect the battery.
• Use the OBD-II scanner to clear any error codes and perform a test drive to ensure the issue does not reoccur.