DTC P1AC4-13: Hybrid/EV Battery Stack 1 Current Interrupt Device Circuit Open [08/2020 - ]: Caution/Notice/Hint
WARNING: This page is about a different car, the 2022 Toyota Avalon and 2021 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Do not turn the power switch on (READY) before completing repairs as this may cause a malfunction.