Conditions for Setting the DTC
WARNING: This page is about a different car, the 2015 GMC Acadia, 2015 Chevrolet Traverse, and 2015 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.