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B1857 Code – Climate Control On/Off Switch Circuit Failure

What are the Possible Causes of the Code B1857?
  • Faulty Climate Control On/Off Switch
  • Climate Control On/Off Switch harness is open or shorted
  • Climate Control On/Off Switch circuit poor electrical connection
  • Faulty Body Control Module (BCM)
  • 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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