Conditions for Setting the DTC
WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
B0081 00
K85 Passenger Presence Module = Component Malfunctions
B0081 3A
K36 Inflatable Restraint Sensing and Diagnostic Module = This sub type is used by the control module to indicate a mismatch between the hardware connected to the control module and the hardware expected by the control module.