Conditions for Clearing the DTC

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

A current DTC B2618 will clear if the short to battery positive voltage in the courtesy lamp low control circuit is no longer detected by the BCM.
A history DTC B2618 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present and no other BCM faults are detected.
The BCM receives a clear code command from the scan tool.