Code 12
WARNING: This page is about a different car, the 1995 Jeep Wrangler, 1995 Jeep Grand Cherokee, and 1995 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
Scan tool displays BATTERY DISCONNECT. Condition is: battery power to PCM was disconnected within last 51 key-on cycles. MIL may not come on.