C1840 Code – Air Suspension Disable Switch Circuit Failure

What are the Possible Causes of the Code C1840?
  • Faulty Air Suspension Disable Switch
  • Air Suspension Disable Switch harness is open or shorted
  • Air Suspension Disable Switch circuit poor electrical connection
  • Faulty Air Suspension 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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