DTC B1007: BCM Internal Memory Malfunction (Write Error): Description

WARNING: This page is about a different car, the 1999 Buick Regal and 1999 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

Body Control Module (BCM) calibrations are stored in Electronically Erasable Programmable Read Only Memory (EEPROM). When ignition is first turned to RUN position, BCM performs internal tests on EEPROM and determines integrity of its non-volatile memory. BCM will also attempt to write to its own non-volatile memory when ignition switch is turned to RUN, then LOCK or OFF position.

DTC B1007 will set when BCM has 3 consecutive unsuccessful attempts at writing to its own non-volatile memory, or when an internal memory malfunction (write error) is detected by BCM. No driver warning message will be displayed.

Under all fault conditions, DTC B1007 requires an ignition cycle from LOCK/OFF to RUN position before the DTC will clear. If conditions for malfunction no longer exist, history DTC will clear after 100 consecutive ignition cycles. DTC B1007 will also clear when conditions no longer exist or when scan tool is used to clear codes.