Redundant Steering Angle Sensor Fault

The vehicle has two steering angle sensors for safety. If one fails or gives incorrect readings, the computer sees a problem.

The primary and redundant steering angle sensors provide voltage signals to the Electronic Control Unit (ECU). Normal values are between 0.5V and 4.5V. If the signals deviate significantly—for example, 2.5V from one and 0.2V from another—this will trigger the code.

Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.

1. 11. Inspect wiring and connectors for the steering angle sensors for damage or corrosion. Repair as necessary.
2. 22. Check the steering angle sensor readings using a scan tool. Confirm both sensors show similar values (within 5 degrees and proper voltage).
3. 33. If discrepancies are found, swap the primary sensor with the redundant sensor and see if the fault code follows the sensor or remains in the system. Check for valid readings after the swap.
4. 44. If the problem persists after swapping, check for ECU software updates or recalibrations that may be needed.
5. 55. If still unresolved, consider replacing the faulty sensors. Test after replacement.

• Faulty steering angle sensor (primary or redundant)
• Wiring issues or corrosion at connectors
• Faulty ECU or software glitch
• Alignment issues affecting sensor readings

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