DTC Descriptor

WARNING: This page is about a different car, the 2017 GMC Acadia Limited, 2017 Chevrolet Traverse, and 2017 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.

DTC B101D: Electronic Control Unit Hardware
DTC B101D 3C: Electronic Control Unit Hardware Performance Internal Communications Failure

For symptom byte information, refer to Symptom Byte List