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.
2012 Toyota Prius Plug-inFACTORY OEM SERVICE PROCEDURE
Power Steering System
POWER STEERING SYSTEM DTC IDENTIFICATION
| DTC Code | Description |
|---|---|
| C1511/11 | Torque Sensor 1 Malfunction |
| C1512/12 | Torque Sensor Circuit Malfunction |
| C1513/13 | Torque Sensor Circuit Malfunction |
| C1514/14 | Torque Sensor Power Source Circuit Malfunction |
| C1515/15 | Torque Sensor Zero Point Adjustment is not Initialized |
| C1516/16 | Torque Sensor Zero Point Adjustment Incomplete |
| C1517/17 | Torque Sensor Hold Malfunction |
| C1524/24 | Motor Circuit Malfunction |
| C1531/31 | EPS ECU Circuit Malfunction |
| C1532/32 | EPS ECU Circuit Malfunction |
| C1533/33 | EPS ECU Circuit Malfunction |
| C1534/34 | EPS ECU Circuit Malfunction |
| C1535/35 | Steering Wheel Location Data Error |
| C1551/51 | IG Power Supply Voltage Malfunction |
| C1552/52 | DC Motor Power Source Voltage Malfunction |
| C1553/53 | When Resetting Voltage, Vehicle is Being Driven |
| C1554/54 | EPS Relay Circuit |
| C1555/55 | Predriver Malfunction |
| C1581/81 | Assist Map Un-Writing |
| C1582/82 | Assist Map Number Mismatch |
| U0129/93 | Lost Communication with Brake System Control Module |
| U0293/92 | Lost Communication with Hybrid 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.
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