Conditions for Setting the DTC
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.
P2122
APP Sensor 1 = Less than 0. 46 V - For greater than 175 ms
P2123
APP Sensor 1 = Greater than 4. 75 V - For greater than 175 ms
P2127
APP Sensor 2 = Less than 0. 33 V - For greater than 175 ms
P2128
APP Sensor 2 = Greater than 2. 6 V - For greater than 175 ms
P2138
APP Sensor 1 and 2 = Not within a calibrated range - For greater than 188 ms