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2021
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CT4 Sport, 4WD
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Section 231 (HVAC - Automatic)
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Diagnostic Information and Procedures
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DTC B2A8B-B2A8E (L3B, LSY)
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Action Taken when the DTC Sets
Action Taken when the DTC Sets
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 BCM does not respond to the switch signal message.
DTC Type B