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 electronic power steering system, the P/S 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 | ||
| C1555 | Motor Relay Welding Failure | |
| 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 Brake System Control Module |
HINT:
The amount of power assistance may be decreased to prevent the motor and ECUs from overheating if the steering wheel is continuously turned when the vehicle is either stopped or driven at a low speed, or if the steering wheel is kept at either full lock position for a long time. In that case, the amount of power assistance will return to normal if the steering wheel is not turned for approximately 10 minutes with the engine idling.
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.