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Home >> Toyota >> 2025 >> Prius Plug-In Hybrid SE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Motor Generator Control System (HEV) - Diagnostic Codes (1 Of 5)) >> MOTOR GENERATOR CONTROL SYSTEM (for M20A-FXS) >> DTC P0A1B-94: Drive Motor "A" Control Module Unexpected Operation [12/2022 - ] >> DTC Summary

DTC Summary

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  1. MALFUNCTION DESCRIPTION 

    For the calculation processing (in particular, calculation processing related to driving force such as torque calculations and inverter control) that takes place inside the motor generator control ECU (MG ECU), the microcomputers built into the motor generator control ECU (MG ECU) monitor each other and check each other's calculations for appropriateness.

    The cause of this malfunction may be the following:

    Motor generator control ECU internal malfunction 

    • Motor generator control ECU (MG ECU) malfunction