Conditions for Setting the DTC

WARNING: This page is about a different car, the 2017 GMC Yukon XL, 2017 GMC Yukon, 2017 Chevrolet Tahoe, and 2017 Chevrolet Suburban. However, it is still accessible from the selected car via links, so may be relevant.

The random access memory (RAM) of the TCCM has failed an operational test indicating that some portions of RAM are not functional.
The read only memory (ROM) or the masked ROM of the TCCM has failed the Checksum test indicating that the data is not currently valid.
The critical operational parameters stored in the EEPROM of the TCCM have failed the Checksum test indicating invalid data.