Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSTOYOTA2025HIGHLANDER LIMITED, FWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 1 (MOTOR GENERATOR CONTROL SYSTEM - DIAGNOSTIC CODES (5 OF 5))
2025 Toyota Highlander Limited, FWD
Section 1 (Motor Generator Control System - Diagnostic Codes (5 Of 5))
2025 Toyota Highlander Limited, FWDSECTION Section 1 (Motor Generator Control System - Diagnostic Codes (5 Of 5))
WARNING: This page is about a different variant/trim than selected.
- Motor Generator Control System
- DTC P0E57-17: DC/DC Converter Voltage Sensor "A" (VL) Circuit Voltage Above Threshold [11/2023 - ]
- DTC P0E71-00: Generator Execution Torque Performance [11/2023 - ]
- DTC P1606-00: Collision detected or Collision Sensor Connection (Open); DTC P1606-04: Collision detected or Collision Sensor Connection (Open) System Internal Failure [11/2023 - ]
- DTC P1BFB-9E: Battery Discharge Control Circuit Stuck On [11/2023 - ]
- DTC P1BFC-A2: Battery Discharge Control Circuit System Voltage Low [11/2023 - ]
- DTC P1C66-1F: Drive Motor "B" Control Module Circuit Intermittent; DTC P1CAE-49: Drive Motor "B" Position Sensor Internal Electronic Failure; DTC P1CB1-38: Drive Motor "B" Position Sensor REF Signal Frequency Incorrect [11/2023 - ]
- DTC P1CA5-1D: Hybrid/EV Generator Circuit Current Out of Range [11/2023 - ]
- DTC P1CAC-49: Generator Position Sensor Internal Electronic Failure; DTC P1C64-1F: Generator Control Module Circuit Intermittent; DTC P1CAF-38: Generator Position Sensor REF Signal Cycle Malfunction Signal Frequency Incorrect [11/2023 - ]
- DTC P1CAD-49: Drive Motor "A" Position Sensor Internal Electronic Failure; DTC P1C65-1F: Generator Control Module Circuit Intermittent; DTC P1CB0-38: Drive Motor "A" Position Sensor REF Signal Frequency Incorrect [11/2023 - ]
- DTC P1CB5-9E: DC/DC Converter Voltage Sensor "A" (VL) Stuck On [11/2023 - ]
- DTC P1CB6-9E: Drive Motor "A" Inverter Voltage Sensor (VH) Stuck On [11/2023 - ]
- DTC P1CCC-96: DC/DC Converter Enable Component Internal Failure [11/2023 - ]
- DTC P1CFF-62: Hybrid/EV Battery Current/DC/DC Converter Current Signal Compare Failure [11/2023 - ]
- DTC P3124-1F: Lost Communication between Drive Motor "A" and HV/EV ECU Circuit Intermittent; DTC P3124-87: Lost Communication between Drive Motor "A" and HV/EV ECU Missing Message [11/2023 - ]
- DTC P314F-1F: DC/DC Converter Voltage Sensor "A" (VL) Circuit Intermittent [11/2023 - ]
- DTC P3153-1D: DC/DC Converter Current Sensor Circuit Current Out of Range [11/2023 - ]
- DTC P322F-11: Communication Error from Airbag to Generator Circuit Short to Ground [11/2023 - ]
- DTC P322F-15: Communication Error from Airbag to Generator Circuit Short to Battery or Open [11/2023 - ]
- DTC P322F-64: Communication Error from Airbag to Generator Signal Plausibility Failure [11/2023 - ]
- DTC U0100-87: Lost Communication With ECM/PCM "A" Missing Message; DTC U0293-87: Lost Communication With Hybrid Powertrain Control Module Missing Message; DTC U1170-08: Lost Communication with Brake System Control Module (ch2) Bus Signal / Message Failure; DTC U1170-87: Lost Communication With Brake System Control Module (ch2) Missing Message [11/2023 - ]
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.