Actions Taken When the DTC Sets
WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
DTCs listed in the DTC Descriptor Category = Type A DTC - Exceptions listed below
DTC P0121 = Type B DTC
- Reduced Engine Power = Active
- P16 Instrument Cluster = Reduced Engine Power
- Under certain conditions, the control module commands the engine Off.