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.
Fail-Safe Chart
If a problem occurs in the electric power steering system, the PS warning light will come on in the combination meter and steering power assistance will be stopped, fixed at a particular point, or decreased simultaneously to protect the system.
| DTC No. | Malfunction | Fail-safe |
|---|---|---|
| C1511 | Torque Sensor Circuit Malfunction | Power assistance stops. |
| C1512 | ||
| C1513 | ||
| C1521 | Motor Circuit Malfunction | |
| C1522 | ||
| C1523 | ||
| C1524 | ||
| C1528 | Motor Rotation Angle Sensor Malfunction | |
| C1531 | ECU Malfunction | |
| C1532 | ||
| C1552 | ||
| C1569 | ||
| C1563 | Power Steering Converter Malfunction | |
| C1568 | ||
| C1555 | Motor Relay Welding Failure | |
| C1564 | Lost Communication With Power Steering Converter | Power assistance is limited. |
| C1565 | ||
| C1533 | ECU Malfunction | System overheat prevention control continues without using the substrate temperature sensor. |
| C1534 | ECU Malfunction | Torque sensor zero point and rotation angle sensor calibration value are set to the default values. |
| C1541 | Vehicle Speed Signal Malfunction | Amount of power assistance is fixed for a speed of 100 km/h (62 mph). |
| U0129 | Lost Communication With Anti-lock Brake System (ABS) Control Module |
HINT:
- With the vehicle stopped or driving very slowly, if the steering wheel is turned repeatedly or turned to a lock position and driven for an extended period of time, the power assistance amount is decreased to prevent overheating of the motor and ECU. If this occurs, idle the engine and do not turn the steering wheel for approximately 10 minutes to return the power assistance to normal.
- If the battery has not been recharged enough or the voltage drops temporarily, the power assistance amount may be decreased and the P/S warning light may be illuminated. If this occurs, the power assistance returns to normal when the battery returns to normal. When troubleshooting malfunctions, use the intelligent tester to check for power load malfunctions through the electric power control system's load control history (see DATA LIST / ACTIVE TEST ).
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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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