Conditions for Clearing the DTC
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
DTCs P127C, P128A, P128B, P16E4 and P16E5 are Type A DTCs.