BMW TSB #B612416
2016 BMW 750
Affected Component: ELECTRICAL SYSTEM
- Summary
- "SME FAULT CODE 21F21F. The fault code (FC) ""21F21F - High-voltage system: Monitoring of insulation resistance deactivated due to fault of the safety box"" is stored in the battery management electronics (SME). The fault does not set any CCM's, is not perceivable to the customer and has no effect on the complete vehicle operation. Safety box malfunction"