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.
Circuit
Short to Ground
Open/High Resistance
Short to Voltage
Signal Performance
Signal
P00B3
P00B4
P00B4*
P112F
Low Reference
-
P00B4
P00B4*
P112F
* Internal ECM or sensor damage may occur if the circuit is shorted to B+.