DTC B1000: Internal BFC Fault Detected: Description
WARNING: This page is about a different car, the 1998 Oldsmobile Cutlass and 1998 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
DTC B1000 will set when a EEPROM checksum error exists. When DTC B1000 is set, SERVICE VEHICLE SOON indicator will illuminate. DTC B1000 can be cleared using scan tool, or history DTC will disappear after 100 ignition cycles if fault conditions do not reoccur.