C1685 Code – 4WAS Main Control Unit Communication

What are the Possible Causes of the Code C1685?
  • Faulty 4 Wheel Active Steer (4WAS) Main Control Unit
  • Faulty 4 Wheel Active Steer (4WAS) Front Control Unit
  • 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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