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C code chassis High severity

C1272 Motor # 2 Input Circuit Failure

The OBD2 code C1272 indicates a failure in the input circuit for Motor #2, which typically relates to a malfunction in the motor's operation or its electrical connections within the vehicle's system

Definition

The OBD2 code C1272 indicates a failure in the input circuit for Motor #2, which typically relates to a malfunction in the motor's operation or its electrical connections within the vehicle's system

Common causes

  • Faulty motor or actuator
  • Damaged wiring or connectors
  • Poor electrical connections
  • Failed control module
  • Short circuit in the input circuit
  • Open circuit in the input circuit
  • Corrosion or dirt in connectors
  • Grounding issues

Common misdiagnoses

  • Faulty ABS module
  • Wiring issues or shorts
  • Bad wheel speed sensor
  • Incorrectly installed or damaged connectors
  • Faulty motor or actuator
  • Software or calibration errors
  • Power supply issues
  • Grounding problems

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are multiple issues

  2. 2. Inspect Wiring and Connectors

    Visually inspect the wiring and connectors associated with Motor #2. Look for signs of damage, corrosion, loose connections, or frayed wires

  3. 3. Ensure that all connectors are securely attached and free of dirt or moisture

  4. 4. Test the Motor

    If applicable, test the motor associated with the code. This may involve checking the resistance of the motor windings or applying power directly to see if it operates correctly

  5. 5. If the motor is faulty, it may need to be replaced

  6. 6. Check Power and Ground

    Use a multimeter to check for proper voltage and ground at the motor's connector. Ensure that the motor is receiving the correct voltage when the system is activated

  7. 7. If there is no power or ground, trace the circuit back to the control module to identify any breaks or shorts

  8. 8. Inspect the Control Module

    If the wiring and motor are functioning correctly, the issue may lie within the control module itself. Check for any signs of damage or water intrusion

  9. 9. If possible, perform a software update or reset the control module to see if that resolves the issue

  10. 10. Perform a Visual Inspection of Related Components

    Inspect other components related to the stability or traction control systems, such as wheel speed sensors, yaw rate sensors, and steering angle sensors. Ensure they are functioning properly

  11. 11. Clear Codes and Test Drive

    After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code reappears

  12. 12. Seek Professional Help

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with the specific vehicle make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue associated with the C1272 code