DTC P1789-00: Lost Communication with Gear Shift Control Module "A" from "B" (Sub CPU) Missing Message [11/2021 - ]: Wiring Diagram

WARNING: This page is about a different car, the 2025 Lexus NX 250, 2024 Lexus NX 250, 2023 Lexus NX 250, and 2022 Lexus NX 250. However, it is still accessible from the selected car via links, so may be relevant.