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 MANUALSTOYOTA2025PRIUS XLE AWDREPAIR AND DIAGNOSISELECTRICALCHARGING SYSTEMSSUB BATTERY SYSTEM - DIAGNOSTIC CODES
2025 Toyota Prius XLE AWD
Sub Battery System - Diagnostic Codes
2025 Toyota Prius XLE AWDSECTION Sub Battery System - Diagnostic Codes
- Sub Battery System
- VEHICLE CONTROL HISTORY (RoB) [12/2022 - ]
- DTC B1032-11: Sub Battery Control Module Internal Temperature Sensor "A" Circuit Short to Ground; DTC B1032-15: Sub Battery Control Module Internal Temperature Sensor "A" Circuit Short to Battery or Open; DTC B2293-7F: Sub Battery System Output Power Relay "F" Actuator Stuck Off; DTC B22AF-00: Internal DC/DC Converter System Performance; DTC B22B0-17: Internal DC/DC Converter (Circuit 1) Circuit Voltage Above Threshold; DTC B22B1-17: Internal DC/DC Converter (Circuit 2) Circuit Voltage Above Threshold; DTC B22B4-19: Internal DC/DC Converter Input Current Circuit Current Above Threshold; DTC B22B5-19: Internal DC/DC Converter Current Circuit Current Above Threshold; DTC B22B9-11: Sub Battery Control Module Reset Prevention Circuit Short to Ground; DTC B22B9-15: Sub Battery Control Module Reset Prevention Circuit Short to Battery or Open; DTC B22C5-7F: Sub Battery System Output Power Relay "B" Actuator Stuck Off; DTC B22C6-7E: Sub Battery System Input Power Relay "A" Actuator Stuck On; DTC B22C6-7F: Sub Battery System Input Power Relay "A" Actuator Stuck Off; DTC B22CA-7F: Sub Battery System Output Power Relay "A" Actuator Stuck Off; DTC B22D5-62: Sub Battery Control Module System Voltage Sensor Signal Compare Failure; DTC B22D6-1C: Sub Battery Control Module Overcurrent/Overvoltage Detection Circuit Voltage Out of Range; DTC B22E4-17: Sub Battery Circuit Voltage Above Threshold; DTC B22E6-19: Sub Battery Circuit Current Above Threshold; DTC B22EF-7E: Sub Battery System Input Power Relay "B" Actuator Stuck On; DTC B2305-62: Internal Control Module Sub Battery Monitor Voltage Signal Compare Failure [12/2022 - ]
- DTC B2293-7E: Sub Battery System Output Power Relay "F" Actuator Stuck On [12/2022 - ]
- DTC B2299-19: Sub Battery System Output Power "F" Circuit Current Above Threshold [12/2022 - ]
- DTC B22A3-11: Sub Battery Control Module Wake Up Circuit Short to Ground [12/2022 - ]
- DTC B22C1-49: Sub Battery Control Module Auxiliary Charging Internal Electronic Failure [12/2022 - ]
- DTC B22C5-7E: Sub Battery System Output Power Relay "B" Actuator Stuck On [12/2022 - ]
- DTC B22CA-7E: Sub Battery System Output Power Relay "A" Actuator Stuck On [12/2022 - ]
- DTC B22CB-19: Sub Battery System Output Power "A" Circuit Current Above Threshold [12/2022 - ]
- DTC B22CF-19: Gear Shift Control Actuator Power Supply Circuit Current Above Threshold [12/2022 - ]
- DTC B22E0-00: Deterioration of Sub Battery [12/2022 - ]
- DTC B2301-87: Lost Communication with Gear Shift Control Module "A" (Line) Missing Message [12/2022 - ]
- DTC P1770-62: Door Lock Switch / Curtesy Switch Signal Compare Failure [12/2022 - ]
- DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message [12/2022 - 03/2023]
- DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message [03/2023 - ]
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.