C1686 Code – 4WAS Main Control Unit

What are the Possible Causes of the Code C1686?
  • Faulty 4 Wheel Active Steer (4WAS) Main Control Unit
  • 4 Wheel Active Steer (4WAS) Main Control Unit harness is open or shorted
  • 4 Wheel Active Steer (4WAS) Main Control Unit circuit poor electrical connection
  • 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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