why does my BMW 3 Series F30/F31 (2012-2019) engine light flash while driving

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to avoid any electrical issues.

2. Inspect and Replace Spark Plugs

1. Remove the engine cover (if applicable).
2. Using a socket wrench, remove spark plug wires or ignition coils.
3. Carefully unscrew and remove the spark plugs using a spark plug socket.
4. Inspect each plug for wear, carbon buildup, or damage. Replace if necessary.
5. Install new spark plugs with the correct gap (consult manufacturer specifications).
6. Reinstall ignition coils and reconnect the spark plug wires.

3. Inspect and Replace Ignition Coils

1. If misfire codes are present, remove the ignition coils for inspection.
2. Check for cracks or damage. If any coils are faulty, replace them with OEM parts.
3. Reinstall the ignition coils ensuring they are secured properly.

4. Clean or Replace Fuel Injectors

1. Access the fuel injectors by removing any necessary components (e.g., intake manifold).
2. Inspect fuel injectors for clogs or leaks.
3. Clean injectors using an appropriate fuel injector cleaner or replace if damaged.

5. Test Fuel Pressure

1. Attach a fuel pressure gauge to the fuel rail.
2. Start the engine and observe the fuel pressure reading.
3. If pressure is below specifications, check the fuel pump and fuel filter; replace as necessary.