DTC Summary

WARNING: This page is about a different car, the 2020 Toyota Avalon and 2019 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

MALFUNCTION DESCRIPTION
The hybrid vehicle control ECU detects malfunctions which prevent the inverter with converter assembly emergency shutdown circuit (HSDN) from shutting down the hybrid control system. Detection is performed when the power switch is turned on (IG) and during the shutdown sequence when the power switch is turned off. If any of the following condition is detected, this DTC will be stored. If the following conditions are not detected, DTC P321E-9F will be stored.
- Hybrid vehicle control ECU malfunction