Conditions for Setting the DTC
WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
P1AF4 and P1AF6
The motor control module detects Positive Supply Isolation sensor voltage less than 20 V.
P1AF5 and P1AF7
The motor control module detects the value of the Positive Supply Isolation voltage subtracted from the pack voltage is greater than 60 V.