Conditions for Setting the DTC
WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.
P2533, P2534
The control module detects 6 V or less on the ignition voltage circuit, with the ignition turned ON.
P2535
The control module detects greater than 6 V or greater on the ignition voltage circuit, with the ignition turned OFF.