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C1144 Wheel Speed Sensor RR Tone Ring Tooth Missing Fault

The OBD2 code C1144 indicates that the right rear wheel speed sensor has detected a missing tooth on the tone ring, which can affect the accuracy of wheel speed readings and potentially impact traction control and...

Definition

The OBD2 code C1144 indicates that the right rear wheel speed sensor has detected a missing tooth on the tone ring, which can affect the accuracy of wheel speed readings and potentially impact traction control and anti-lock braking system (ABS) performance

Common causes

  • Damaged or missing tone ring
  • Corroded or damaged wheel speed sensor
  • Misalignment of the wheel speed sensor
  • Debris or dirt on the tone ring
  • Faulty wheel speed sensor
  • Wiring issues or shorts in the sensor circuit
  • Brake system issues affecting the sensor
  • Improper installation of the tone ring or sensor

Common misdiagnoses

  • Faulty wheel speed sensor
  • Damaged wiring or connectors
  • ABS control module failure
  • Brake system issues
  • Incorrect tire size or pressure
  • Faulty tone ring
  • Wheel bearing problems
  • Calibration errors

Troubleshooting steps

  1. 1. Visual Inspection

    Check the Tone Ring: Inspect the right rear wheel speed sensor tone ring for any visible damage, such as missing teeth or cracks

  2. 2. Sensor Condition

    Examine the wheel speed sensor for any signs of damage, corrosion, or dirt buildup that could affect its operation

  3. 3. Wiring and Connectors

    Inspect the wiring harness and connectors leading to the wheel speed sensor for any signs of wear, fraying, or disconnection

  4. 4. Sensor Testing

    Resistance Check: Use a multimeter to check the resistance of the wheel speed sensor. Compare the readings to the manufacturer's specifications

  5. 5. Signal Testing

    If possible, use an oscilloscope or a scan tool to monitor the signal output from the wheel speed sensor while the vehicle is in motion. Look for a consistent signal that corresponds to wheel speed

  6. 6. Check for Other Codes

    Scan for Additional Codes: Use an OBD-II scanner to check for any other related trouble codes that may provide more context to the issue

  7. 7. Inspect Wheel Assembly

    Brake Components: Check the brake components for any interference that could affect the sensor or tone ring

  8. 8. Wheel Bearing

    Inspect the wheel bearing for wear or damage, as this can affect the alignment and operation of the tone ring and sensor

  9. 9. Clear Codes and Test Drive

    Clear the Code: After performing any repairs or adjustments, clear the trouble code using an OBD-II scanner

  10. 10. Test Drive

    Take the vehicle for a test drive to see if the code reappears. Monitor the ABS and traction control systems to ensure they are functioning correctly

  11. 11. Replace Components if Necessary

    Replace the Tone Ring: If the tone ring is damaged or has missing teeth, it will need to be replaced

  12. 12. Replace the Wheel Speed Sensor

    If the sensor is found to be faulty, replace it with a new one

  13. 13. Professional Diagnosis

    If the issue persists after performing the above steps, consider seeking help from a professional mechanic or technician who has experience with ABS and traction control systems. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the C1144 code