Conditions for Setting the DTC
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.
C116D 54
Incomplete or failed Manual Learn (due to either timing out after learning at least one sensor and not learning all four sensors or exiting learn mode after learning at least one sensor and vehicle being out of PARK or vehicle power mode not in RUN/Propulsion).
C116D 56
The tire type and placard information for the front and rear have not been programmed.