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C1955 Steering Angle Sensor Circuit Open

The OBD2 code C1955 indicates that there is an open circuit in the steering angle sensor, which means the sensor is not providing a proper signal to the vehicle's control module

Definition

The OBD2 code C1955 indicates that there is an open circuit in the steering angle sensor, which means the sensor is not providing a proper signal to the vehicle's control module

Common causes

  • Faulty steering angle sensor
  • Damaged wiring or connectors
  • Poor electrical connections
  • Corroded terminals
  • Malfunctioning power supply to the sensor
  • Software issues or calibration errors
  • Physical damage to the sensor or its mounting
  • Issues with the vehicle's electronic control unit (ECU)

Common misdiagnoses

  • Faulty steering angle sensor
  • Wiring issues or damaged connectors
  • Faulty power steering control module
  • Calibration errors
  • Issues with the vehicle's stability control system
  • Faulty ABS module
  • Incorrect wheel alignment
  • Problems with the steering column or rack

Troubleshooting steps

  1. 1. Visual Inspection

    Wiring and Connectors: Check the wiring harness and connectors associated with the steering angle sensor for any signs of damage, corrosion, or loose connections

  2. 2. Sensor Condition

    Inspect the steering angle sensor itself for physical damage or signs of wear

  3. 3. Check for Other Codes

    Use an OBD-II scanner to check for any additional trouble codes that may provide more context or indicate related issues

  4. 4. Test the Steering Angle Sensor

    Voltage and Ground: Use a multimeter to check for proper voltage and ground at the sensor connector. Ensure that the sensor is receiving the correct voltage as specified in the vehicle's service manual

  5. 5. Signal Output

    Measure the output signal from the steering angle sensor while turning the steering wheel. The output should change smoothly and consistently as the wheel is turned

  6. 6. Inspect the Steering Column

    Ensure that the steering column is properly aligned and that there are no obstructions or mechanical issues affecting the steering angle sensor's operation

  7. 7. Check for Software Updates

    Sometimes, manufacturers release software updates that can resolve issues related to sensor readings. Check if there are any updates available for your vehicle's ECU

  8. 8. Clear Codes and Test Drive

    After performing any repairs or adjustments, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  9. 9. Replace the Steering Angle Sensor

    If all other checks are satisfactory and the code persists, the steering angle sensor itself may be faulty and may need to be replaced

  10. 10. Professional Diagnosis

    If you are unable to resolve the issue after these steps, consider seeking help from a professional mechanic or dealership, as they may have specialized tools and knowledge to diagnose the problem more accurately.Additional Tips: - Always refer to the vehicle's service manual for specific procedures and specifications related to the steering angle sensor and its circuit. - Ensure that the vehicle's battery is in good condition, as low voltage can sometimes cause sensor issues. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the C1955 code