C1118 Code – Trailer Brake Control Sensitivity Switch Circuit Malfunction

What are the Possible Causes of the Code C1118?
  • Faulty Trailer Brake Control Switch
  • Trailer Brake Control Switch harness is open or shorted
  • Trailer Brake Control Switch circuit poor electrical connection
  • Faulty Chassis Control Module-Auxiliary
  • Faulty Transfer Case Control Module
  • Need help with this OBD II code? Our mechanics are available within west Michigan to help. Outside of our service area? Visit our Car Help Section where you can ask questions and get answers.

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