Conditions for Clearing the DTC

WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

A fault in the park lamp relay control circuit is no longer detected by the BCM when the park lamp relay is commanded to energize. After the fault is removed the ignition must be cycled to clear the code.
A short to ground in the switched park lamp voltage supply circuit is no longer detected by the BCM when the park lamp relay is commanded to energize. After the fault is removed the ignition must be cycled to clean the code.
A history DTC B3838 will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
The BCM receives a clear code command from the scan tool.