Conditions for Running 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.
P0231, P023F
The ignition voltage is between 9 - 18 V.
P0232
The control enable voltage signal supplied for the ECM to chassis control module is inactive for 4 seconds after engine has been shut off.