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Home >> Toyota >> 2020 >> Highlander L, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 9 (Hybrid Control System - Diagnostic Codes (1 Of 5)) >> Hybrid Control System >> DTC P0A1B-94: Drive Motor "A" Control Module Unexpected Operation [11/2023 - ] >> Description

DTC P0A1B-94: Drive Motor "A" Control Module Unexpected Operation [11/2023 - ]: Description

WARNING: This page is about a different car, the 2025 Toyota Highlander and 2024 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.

The hybrid vehicle control ECU monitors the motor generator control ECU (MG ECU) and stores this DTC when it detects a malfunction.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate
P0A1B-94 Drive Motor "A" Control Module Unexpected Operation The motor generator control ECU (MG ECU) value received by the hybrid vehicle control ECU exceeds the threshold for a certain period of time.
(1 trip detection logic)
  • Inverter with converter assembly
  • IGCT relay
  • IGCT-IG fuse
 Comes on Master Warning:
Comes on
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