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.
2001 Toyota PriusFACTORY OEM SERVICE PROCEDURE
Hybrid Vehicle Control System DTCS
DIAGNOSTIC TROUBLE CODE DEFINITIONS
| DTC | Description |
|---|---|
| B2799 | Immobilizer Malfunction |
| C2692/C2693 | Regenerative Brake Check |
| P1120 | Accelerator Pedal Position Sensor Circuit Malfunction |
| P1520 | Stop Light Switch (Cruise Control System) Malfunction |
| P1566 | Cruise Control System Malfunction |
| P1600 | BATT Malfunction |
| P1780 | Park/neutral Position Switch System Malfunction |
| P3000 | HV Battery Malfunction |
| P3001 | HV Battery ECU Malfunction |
| P3004 | Power Cable Malfunction |
| P3100 | HV ECU Malfunction |
| P3101 | Engine System Malfunction |
| P3105 | Battery ECU Communication Circuit Malfunction |
| P3106 | ECM Communication Circuit Malfunction |
| P3107 | Airbag ECU Communication Circuit Malfunction |
| P3108 | A/C Amplifier Communication Circuit Malfunction |
| P3109 | Brake ECU Communication Circuit Malfunction |
| P3110 | IGCT Relay Malfunction |
| P3115 | System Main Relay Malfunction |
| P3120 | HV Transaxle Malfunction |
| P3125 | Converter & Inverter Assembly Malfunction |
| P3130 | Inverter Cooling System Malfunction |
| P3135 | Circuit Breaker Sensor Malfunction |
| P3140 | Interlock Malfunction |
| P3145 | Vehicle Speed Sensor Circuit Malfunction |
Factory Service Tools
Use the Manual With the Right Hardware
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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.