Active And Stored Trouble Codes
WARNING: This page is about a different car, the 2002 Dodge Grand Caravan, 2002 Dodge Caravan, 2002 Chrysler Voyager, and 2002 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.
The Automatic Temperature Control (ATC) is capable of storing Active and Stored trouble codes. Active codes indicate a current fault in the system. Stored codes indicate that a problem has occurred in the system, however is not currently present. Active codes cannot be erased until the problem causing the code has been repaired. At this time the Active code is converted to a Stored code, which can be erased using the DRBIII®.