Conditions for Setting the DTC
WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
B2345 13
Any temperature sensor input that remains below 1.5 volts for more than 1 second.
B2345 42
This DTC will set if the RHSM calibration is not programmed.
B2345 4B
This DTC will set if the RHSM calibration is out of range.