What the fix for BMW codes 1159 and 1161?

BMW codes 1159 and 1161 typically relate to issues with the oxygen sensor and fuel trim. To fix these codes, first check for any vacuum leaks or issues with the air intake system, as these can affect sensor readings. Next, inspect and potentially replace the oxygen sensors if they are faulty. Additionally, ensure that the fuel system is functioning correctly, as improper fuel delivery can also trigger these codes.