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Home >> Toyota >> 2016 >> Highlander Hybrid Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 76 (Hybrid Control System (2GR-FXS) - Diagnostic Codes (2 Of 6)) >> Hybrid Control System >> DTC P0A94-557: DC / DC Converter Performance [11/2016 - ] >> Description

DTC P0A94-557: 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
P0A94-557 DC / DC Converter Performance Boost converter fail signal detected (circuit malfunction)
(1 trip detection logic)
  • Wire harness or connector
  • Inverter cooling system
  • Hybrid vehicle transaxle assembly
  • Inverter with converter assembly
  • Cooling fan circuit
  • PCU fuse
  • Hybrid vehicle control ECU assembly
  • Rear traction motor with transaxle assembly
  • Extension wire assembly
  • No. 6 floor wire
 Comes on Master Warning Light:
Comes on
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