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C1783 Code – Door Courtesy Switch Circuit

What are the Possible Causes of the Code C1783?
  • Faulty Door Courtesy Switch
  • Door Courtesy Switch harness is open or shorted
  • Door Courtesy Switch circuit poor electrical connection
  • Faulty Suspension Control ECU
  • 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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