How to Clear Diagnostic Trouble Codes

BMW Service Tester:

BMW MoDiC:

The contents of the defect code memory can be cleared with the BMW DIAGNOSTIC SYSTEM.
Diagnostic Functions

Important!

On no account clear the defect codes before repair, otherwise important information (troubleshooting, additional information etc.) will no longer appear on the display screen.

Clearing Defect Code Memory:

There are three possible ways of clearing the defect code memory:

Within 3 seconds after the end of the flash code output (after 47 seconds) when the ASC lamp lights permanently once again, press the ASC button for at least 1 second.

Disconnect vehicle battery. (Attention! Defect code memories of other systems may be cleared)

Disconnect control unit. (Attention! Ignition must be switched oft) In the case of ABS/ASC+T control units with the BMW No.1 159 494 (diagnostic capability via the diagnostic links), the contents of the defect code memory can be cleared with the BMW diagnostic system. The contents of the defect code memory are not deleted if the control unit is disconnected.