LEMON Manuals
: Even more car manuals for everyone: 1960-2025
Home
>>
Chevrolet
>>
2002
>>
Impala LS
>>
Repair and Diagnosis
>>
Accessories & Equipment
>>
Communication Devices
>>
Body Control Modules
>>
Diagnostic Tests
>>
DTC B1009: Checksum Error In Control Module
>>
Action Taken When The DTC Sets
April 5, 2026:
LEMON Manuals is launched!
Read the announcement.
Action Taken When The DTC Sets
The module reverts to base operation values programed for those blocks of data that have failed the check sum test. The blocks of data that have not failed the check sum test are not affected.