WOMS
C code chassis High severity

C1141 Wheel Speed Sensor LF Tone Ring Tooth Missing Fault

The OBD2 code C1141 indicates that the left front wheel speed sensor is detecting a missing tooth on the tone ring, which can affect the vehicle's traction control and anti-lock braking system

Definition

The OBD2 code C1141 indicates that the left front wheel speed sensor is detecting a missing tooth on the tone ring, which can affect the vehicle's traction control and anti-lock braking system

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 or sensor
  • Faulty wiring or connectors
  • Sensor malfunction or failure
  • Brake rotor or hub assembly issues

Common misdiagnoses

  • Faulty wheel speed sensor
  • Damaged wiring or connectors
  • ABS control module failure
  • Incorrectly installed tone ring
  • Brake system issues
  • Faulty hub assembly
  • Misalignment of wheel components
  • Tire size discrepancies

Troubleshooting steps

  1. 1. Visual Inspection

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

  2. 2. Sensor Condition

    Examine the wheel speed sensor itself for any signs of damage, corrosion, or dirt buildup

  3. 3. Wiring and Connectors

    Inspect the wiring harness and connectors leading to the wheel speed sensor for fraying, corrosion, or loose connections

  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 to check the output signal from the wheel speed sensor while the wheel is turning. The signal should be a clean sine wave

  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 rotor and caliper for any interference with the wheel speed sensor or tone ring

  8. 8. Wheel Bearing

    Inspect the wheel bearing for wear or damage, as this can affect the sensor's operation

  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 for proper operation

  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 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 C1141 code