DTC P0A94-9E: DC/DC Converter Stuck On; DTC P0D33-19: DC/DC Converter Circuit Current Above Threshold [10/2022 - ]: Description

WARNING: This page is about a different car, the 2025 Lexus RX 350h, 2024 Lexus RX 350h, and 2023 Lexus RX 350h. However, it is still accessible from the selected car via links, so may be relevant.

For a description of the boost converter.

Refer to DESCRIPTION

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate	DTC Output from	Priority	Note
P0A94-9E	DC/DC Converter Stuck On	Boost converter fail signal detected (circuit malfunction) (1 trip detection logic)	Inverter cooling system Cooling fan system Wire harness or connector Motor cable Floor under wire (rear traction motor cable) Hybrid vehicle transaxle assembly Rear traction motor with transaxle assembly PCU FR/PCU fuse Hybrid motor control inverter assembly Hybrid vehicle control ECU	Comes on	Master Warning: Comes on	Motor Generator	A	SAE Code: P0A94
P0D33-19	DC/DC Converter Circuit Current Above Threshold	Boost converter fail signal detected: A malfunction is detected in any of the boost converter components (inverter, hybrid vehicle transaxle, motor generator control ECU, etc.). (1 trip detection logic)	Inverter cooling system Cooling fan system Wire harness or connector Motor cable Floor under wire (rear traction motor cable) Hybrid vehicle transaxle assembly Rear traction motor with transaxle assembly PCU FR/PCU fuse Hybrid motor control inverter assembly Hybrid vehicle control ECU	Comes on	Master Warning: Comes on	Motor Generator	A	SAE Code: P0D33