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Home >> Cadillac >> 2021 >> CT4 Sport, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 231 (HVAC - Automatic) >> Diagnostic Information and Procedures >> DTC B2A8B-B2A8E (L3B, LSY) >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2022 Cadillac CT4. However, it is still accessible from the selected car via links, so may be relevant.

The body control module communicates with the user interface control via serial data. This DTC indicates an internal fault in the user interface control. The user interface control may continue to respond normally to faceplate functions when this DTC is set.

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