Action Taken When the DTC Sets
WARNING: This page is about a different car, the 2017 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.
B144B 01, B144B 04
No action is taken.
B144B 02
The module output driver will be shut down and not supply voltage to the Auxiliary Ignition Run Relay control circuit.