Conditions for Setting the DTC
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.
The control module setting the DTC has attempted to establish communications on the serial data circuits more than 3 times in 5 seconds.