how to fix a check engine light on my BMW 5 Series F10/F11 (2010-2017)

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is cool.
• Disconnect the battery to prevent electrical shorts during repair.

2. Address Identified Issues

If error codes indicate a specific issue (e.g., P0171 for lean condition):

• Fuel System Check
  • Inspect fuel lines for leaks.
  • Replace the fuel filter if clogged.
  • Test fuel pump pressure and replace if inadequate.

If gas cap is faulty:

• Replace the gas cap with a new one that meets OEM specifications.

If ignition coils or spark plugs are faulty:

• Remove the ignition coils using a socket set.
• Inspect and replace faulty coils and/or spark plugs.
  • Torque: 16 Nm (12 lb-ft) for spark plugs.

3. Reconnect Components

• Reattach any components removed during inspection or repair.
• Reconnect the battery, ensuring terminals are secure.