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.
2021 Toyota Prius LE AWD-eFACTORY OEM SERVICE PROCEDURE
Rear Motor Generator Control System
REAR MOTOR GENERATOR CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC Code | Description |
|---|---|
| P06B3-1C | Drive Motor "B" Control Module Position Sensor REF Power Source Circuit Voltage Out of Range |
| P0A1C-1F | Drive Motor "B" Control Module Circuit Intermittent |
| P0A45-16 | Drive Motor "B" Position Sensor Circuit Voltage Below Threshold |
| P0A45-1F | Drive Motor "B" Position Sensor Circuit Intermittent |
| P0A45-21 | Drive Motor "B" Position Sensor Signal Amplitude < Minimum |
| P0A45-22 | Drive Motor "B" Position Sensor Signal Amplitude > Maximum |
| P0A69-12 | Drive Motor "B" Phase V Current(High Resolution) Circuit Short to Battery |
| P0A69-14 | Drive Motor "B" Phase V Current(High Resolution) Circuit Short to Ground or Open |
| P0A69-1C | Drive Motor "B" Phase V Current(High Resolution) Circuit Voltage Out of Range |
| P0A69-1F | Drive Motor "B" Phase V Current(High Resolution) Circuit Intermittent |
| P0A6C-12 | Drive Motor "B" Phase W Current(High Resolution) Circuit Short to Battery |
| P0A6C-14 | Drive Motor "B" Phase W Current(High Resolution) Circuit Short to Ground or Open |
| P0A6C-1C | Drive Motor "B" Phase W Current(High Resolution) Circuit Voltage Out of Range |
| P0A6C-1F | Drive Motor "B" Phase W Current(High Resolution) Circuit Intermittent |
| P0A79-9E | Drive Motor "B" Inverter Stuck On |
| P0AF2-11 | Drive Motor Inverter Temperature Sensor "B" Circuit Short to Ground |
| P0AF2-15 | Drive Motor Inverter Temperature Sensor "B" Circuit Short to Battery or Open |
| P0AF2-1F | Drive Motor Inverter Temperature Sensor "B" Circuit Intermittent |
| P0BD1-11 | Drive Motor Inverter Temperature Sensor "C" Circuit Circuit Short to Ground |
| P0BD1-15 | Drive Motor Inverter Temperature Sensor "C" Circuit Circuit Short to Battery or Open |
| P0BD1-1F | Drive Motor Inverter Temperature Sensor "C" Circuit Circuit Intermittent |
| P0BF5-12 | Drive Motor "B" Phase V Current Sensor Circuit Short to Battery |
| P0BF5-14 | Drive Motor "B" Phase V Current Sensor Circuit Short to Ground or Open |
| P0BF5-1F | Drive Motor "B" Phase V Current Sensor Circuit Intermittent |
| P0BF5-28 | Drive Motor "B" Phase V Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure |
| P0BF9-12 | Drive Motor "B" Phase W Current Sensor Circuit Short to Battery |
| P0BF9-14 | Drive Motor "B" Phase W Current Sensor Circuit Short to Ground or Open |
| P0BF9-1F | Drive Motor "B" Phase W Current Sensor Circuit Intermittent |
| P0BF9-28 | Drive Motor "B" Phase W Current Sensor Signal Bias Level Out of Range / Zero Adjustment Failure |
| P0C02-1D | Drive Motor "B" System Circuit Current Out of Range |
| P0C1A-00 | Drive Motor "B" Execution Torque Performance |
| P0C31-00 | Drive Motor Inverter Temperature Sensor "C" Circuit |
| P0C55-13 | Drive Motor "B" Position Sensor Circuit "A" Circuit Open |
| P0C55-16 | Drive Motor "B" Position Sensor Circuit "A" Circuit Voltage Below Threshold |
| P0C55-17 | Drive Motor "B" Position Sensor Circuit "A" Circuit Voltage Above Threshold |
| P0C55-1F | Drive Motor "B" Position Sensor Circuit "A" Circuit Intermittent |
| P0C5F-13 | Drive Motor "B" Position Sensor Circuit "B" Circuit Open |
| P0C5F-16 | Drive Motor "B" Position Sensor Circuit "B" Circuit Voltage Below Threshold |
| P0C5F-17 | Drive Motor "B" Position Sensor Circuit "B" Circuit Voltage Above Threshold |
| P0C5F-1F | Drive Motor "B" Position Sensor Circuit "B" Circuit Intermittent |
| P0C7A-17 | Drive Motor "B" Inverter Voltage Sensor "A" Circuit Voltage Above Threshold |
| P0DA3-16 | Drive Motor "B" Inverter Voltage Sensor "A" Circuit Voltage Below Threshold |
| P0DA3-17 | Drive Motor "B" Inverter Voltage Sensor "A" Circuit Voltage Above Threshold |
| P0DA3-1F | Drive Motor "B" Inverter Voltage Sensor "A" Circuit Intermittent |
| P1C2C-1C | Drive Motor "B" Control Module AD Converter Circuit Voltage Out of Range |
| P1C2C-49 | Drive Motor "B" Control Module AD Converter Circuit Internal Electronic Failure |
| P1C5E-19 | Drive Motor "B" Inverter Circuit Current Above Threshold |
| P1C61-1F | Drive Motor "B" Control Module Position Sensor REF Power Source Circuit Intermittent |
| P1C63-1F | Drive Motor "B" Control Module Offset Power Circuit Intermittent |
| P1C66-1F | Drive Motor "B" Control Module Circuit Intermittent |
| P1CAE-49 | Drive Motor "B" Position Sensor Internal Electronic Failure |
| P1CB1-38 | Drive Motor "B" Position Sensor REF Signal Frequency Incorrect |
| P1CE4-9E | Drive Motor "B" Inverter Voltage Sensor "A" Stuck On |
| P262C-1C | Drive Motor "B" Control Module Offset Power Circuit Voltage Out of Range |
| P3104-62 | Drive Motor Inverter Temperature Sensor "B" Signal Compare Failure |
| P3149-1F | Lost Communication between Drive Motor "A" and "B" Circuit Intermittent |
| P3149-87 | Lost Communication between Drive Motor "A" and "B" Missing Message |
| P31E4-1F | Drive Motor "B" Phase V Current Sensor Circuit Intermittent |
| P31E5-1F | Drive Motor "B" Phase W Current Sensor Circuit Intermittent |
| P33C0-12 | Drive Motor "B" Phase V Current Sensor Sub Circuit Short to Battery |
| P33C0-14 | Drive Motor "B" Phase V Current Sensor Sub Circuit Short to Ground or Open |
| P33C0-1F | Drive Motor "B" Phase V Current Sensor Sub Circuit Intermittent |
| P33C0-28 | Drive Motor "B" Phase V Current Sensor Sub Signal Bias Level Out of Range / Zero Adjustment Failure |
| P33C5-12 | Drive Motor "B" Phase W Current Sensor Sub Circuit Short to Battery |
| P33C5-14 | Drive Motor "B" Phase W Current Sensor Sub Circuit Short to Ground or Open |
| P33C5-1F | Drive Motor "B" Phase W Current Sensor Sub Circuit Intermittent |
| P33C5-28 | Drive Motor "B" Phase W Current Sensor Sub Signal Bias Level Out of Range / Zero Adjustment Failure |
| P33D8-62 | Drive Motor "B" Phase V Current Sensor Signal Compare Failure |
| P33D9-62 | Drive Motor "B" Phase W Current Sensor Signal Compare Failure |
Factory Service Tools
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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.
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