DTC P0A94-127: DC / DC Converter Performance [11/2016 - ]: Description

WARNING: This page is about a different car, the 2019 Toyota Highlander, 2018 Toyota Highlander, and 2017 Toyota Highlander. 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 .

If a malfunction occurs in the boost converter, the MG ECU detects it and transmits this information to the hybrid vehicle control ECU assembly.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Warning Indicate
P0A94-127	DC / DC Converter Performance	Boost converter overvoltage signal detected (overvoltage due to system malfunction): Overvoltage is detected before boosting. A malfunction is detected in any of the boost converter components (inverter, hybrid vehicle transaxle assembly, MG ECU, etc.). (1 trip detection logic)	Hybrid battery junction block assembly Inverter with converter assembly Service plug grip No. 6 floor wire Hybrid vehicle transaxle assembly Wire harness or connector PCU fuse Hybrid vehicle control ECU assembly Rear traction motor with transaxle assembly Extension wire assembly	Comes on	Master Warning Light: Comes on