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 PLUG-IN HYBRID XSE PREMIUMREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXDTC INDEX (3 OF 3)POWER DISTRIBUTION DTCSSUB BATTERY SYSTEM
2025 Toyota Prius Plug-In Hybrid XSE Premium
Sub Battery System
2025 Toyota Prius Plug-In Hybrid XSE PremiumSECTION Sub Battery System
SUB BATTERY SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [12/2022 - 03/2023]
| DTC Code | Description |
|---|---|
| B1032-11 | Sub Battery Control Module Internal Temperature Sensor "A" Circuit Short to Ground |
| B1032-15 | Sub Battery Control Module Internal Temperature Sensor "A" Circuit Short to Battery or Open |
| B2293-7E | Sub Battery System Output Power Relay "F" Actuator Stuck On |
| B2293-7F | Sub Battery System Output Power Relay "F" Actuator Stuck Off |
| B2299-19 | Sub Battery System Output Power "F" Circuit Current Above Threshold |
| B22A3-11 | Sub Battery Control Module Wake Up Circuit Short to Ground |
| B22AF-00 | Internal DC/DC Converter System Performance |
| B22B0-17 | Internal DC/DC Converter (Circuit 1) Circuit Voltage Above Threshold |
| B22B1-17 | Internal DC/DC Converter (Circuit 2) Circuit Voltage Above Threshold |
| B22B4-19 | Internal DC/DC Converter Input Current Circuit Current Above Threshold |
| B22B5-19 | Internal DC/DC Converter Current Circuit Current Above Threshold |
| B22B9-11 | Sub Battery Control Module Reset Prevention Circuit Circuit Short to Ground |
| B22B9-15 | Sub Battery Control Module Reset Prevention Circuit Circuit Short to Battery or Open |
| B22C1-49 | Sub Battery Control Module Auxiliary Charging Internal Electronic Failure |
| B22C5-7E | Sub Battery System Output Power Relay "B" Actuator Stuck On |
| B22C5-7F | Sub Battery System Output Power Relay "B" Actuator Stuck Off |
| B22C6-7E | Sub Battery System Input Power Relay "A" Actuator Stuck On |
| B22C6-7F | Sub Battery System Input Power Relay "A" Actuator Stuck Off |
| B22CA-7E | Sub Battery System Output Power Relay "A" Actuator Stuck On |
| B22CA-7F | Sub Battery System Output Power Relay "A" Actuator Stuck Off |
| B22CB-19 | Sub Battery System Output Power "A" Circuit Current Above Threshold |
| B22CF-19 | Gear Shift Control Actuator Power Supply Circuit Current Above Threshold |
| B22D5-62 | Sub Battery Control Module System Voltage Sensor Signal Compare Failure |
| B22D6-1C | Sub Battery Control Module Overcurrent/Overvoltage Detection Circuit Voltage Out of Range |
| B22E0-00 | Deterioration of Sub Battery |
| B22E4-17 | Sub Battery Circuit Voltage Above Threshold |
| B22E6-19 | Sub Battery Circuit Current Above Threshold |
| B22EF-7E | Sub Battery System Input Power Relay "B" Actuator Stuck On |
| B2301-87 | Lost Communication with Gear Shift Control Module "A" (Line) Missing Message |
| B2305-62 | Internal Control Module Sub Battery Monitor Voltage Signal Compare Failure |
| P1770-62 | Door Lock Switch / Curtesy Switch Signal Compare Failure |
| U0129-87 | Lost Communication with Brake System Control Module "A" Missing Message |
SUB BATTERY SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION [03/2023 - ]
| DTC Code | Description |
|---|---|
| B1032-11 | Sub Battery Control Module Internal Temperature Sensor "A" Circuit Short to Ground |
| B1032-15 | Sub Battery Control Module Internal Temperature Sensor "A" Circuit Short to Battery or Open |
| B2293-7E | Sub Battery System Output Power Relay "F" Actuator Stuck On |
| B2293-7F | Sub Battery System Output Power Relay "F" Actuator Stuck Off |
| B2299-19 | Sub Battery System Output Power "F" Circuit Current Above Threshold |
| B22A3-11 | Sub Battery Control Module Wake Up Circuit Short to Ground |
| B22AF-00 | Internal DC/DC Converter System Performance |
| B22B0-17 | Internal DC/DC Converter (Circuit 1) Circuit Voltage Above Threshold |
| B22B1-17 | Internal DC/DC Converter (Circuit 2) Circuit Voltage Above Threshold |
| B22B4-19 | Internal DC/DC Converter Input Current Circuit Current Above Threshold |
| B22B5-19 | Internal DC/DC Converter Current Circuit Current Above Threshold |
| B22B9-11 | Sub Battery Control Module Reset Prevention Circuit Circuit Short to Ground |
| B22B9-15 | Sub Battery Control Module Reset Prevention Circuit Circuit Short to Battery or Open |
| B22C1-49 | Sub Battery Control Module Auxiliary Charging Internal Electronic Failure |
| B22C5-7E | Sub Battery System Output Power Relay "B" Actuator Stuck On |
| B22C5-7F | Sub Battery System Output Power Relay "B" Actuator Stuck Off |
| B22C6-7E | Sub Battery System Input Power Relay "A" Actuator Stuck On |
| B22C6-7F | Sub Battery System Input Power Relay "A" Actuator Stuck Off |
| B22CA-7E | Sub Battery System Output Power Relay "A" Actuator Stuck On |
| B22CA-7F | Sub Battery System Output Power Relay "A" Actuator Stuck Off |
| B22CB-19 | Sub Battery System Output Power "A" Circuit Current Above Threshold |
| B22CF-19 | Gear Shift Control Actuator Power Supply Circuit Current Above Threshold |
| B22D5-62 | Sub Battery Control Module System Voltage Sensor Signal Compare Failure |
| B22D6-1C | Sub Battery Control Module Overcurrent/Overvoltage Detection Circuit Voltage Out of Range |
| B22E0-00 | Deterioration of Sub Battery |
| B22E4-17 | Sub Battery Circuit Voltage Above Threshold |
| B22E6-19 | Sub Battery Circuit Current Above Threshold |
| B22EF-7E | Sub Battery System Input Power Relay "B" Actuator Stuck On |
| B2301-87 | Lost Communication with Gear Shift Control Module "A" (Line) Missing Message |
| B2305-62 | Internal Control Module Sub Battery Monitor Voltage Signal Compare Failure |
| P1770-62 | Door Lock Switch / Curtesy Switch Signal Compare Failure |
| U0129-87 | Lost Communication with Brake System Control Module "A" Missing Message |
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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.