LEMON Manuals: Even more car manuals for everyone
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-1F: Generator Control Module Circuit Intermittent [12/2022 - ] >> Description

DTC P0A1B-1F: Generator Control Module Circuit Intermittent [12/2022 - ]: Description

WARNING: This page is about a different variant/trim than selected.

If the motor generator control ECU, which is built into the inverter with converter assembly, is reset due to a problem with the power source in the inverter, the motor generator control ECU will store this DTC.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate DTC Output from Priority Note
P0A1B-1F Generator Control Module Circuit Intermittent Error in reset signal from the inverter assembly power source IC:
If internal power source voltage drops below the normal CPU operating voltage or the ROM/RAM is malfunctioning, the power source IC resets the MG ECU and stores this DTC.
(1 trip detection logic)
  • Wire harness or connector
  • Inverter with converter assembly
  • Auxiliary battery terminal
Comes on Master Warning:
Comes on
Motor Generator A SAE Code:
P0A1B