Chevrolet Repair Questions? Ask a Chevy Mechanic for Answers ASAP
Some customers may comment on the charging system light being illuminated in the instrument panel cluster and the "Service Battery Charging System" message being displayed on the Driver Information Center.
Upon further investigation, the technician may find DTC B1405 and/or B1516 set.
The BCM may reset while cranking the engine under low voltage conditions. The battery current sensor may draw excessive current during the BCM reset. B1405 and/or B1516 will set during this condition.
DO NOT replace the battery current sensor or the BCM.
A new service calibration has been developed to correct this condition. Reprogram the BCM with the software available in TIS2WEB.