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.
2007 Toyota Prius BaseFACTORY OEM SERVICE PROCEDURE
Power Steering DTCS
POWER STEERING DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| C1511 | Torque Sensor Circuit Malfunction |
| C1512 | Torque Sensor Circuit Malfunction |
| C1513 | Torque Sensor Circuit Malfunction |
| C1514 | Torque Sensor Power Supply Abnormal |
| C1515 | Torque Sensor Zero Point Adjustment Undone |
| C1516 | Torque Sensor Zero Point Adjustment Incomplete |
| C1517 | Torque Hold Abnormal |
| C1524 | Motor Circuit Malfunction |
| C1531 | ECU Malfunction |
| C1532 | ECU Malfunction |
| C1533 | ECU Malfunction |
| C1534 | ECU Malfunction |
| C1551 | IG Power Supply Voltage Malfunction |
| C1552 | PIG Power Supply Voltage Malfunction |
| C1554 | Power Supply Relay Failure |
| C1555 | Motor Relay Welding Failure |
| C1581 | Assist Map Number Un-Writing |
| U0073 | Control Module Communication Bus OFF |
| U0121 | Lost Communication with Antilock Brake System (ABS) Control Module |
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.