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B1859 Code – Climate Control A/C Pressure Switch Circuit Open

What are the Possible Causes of the Code B1859?
  • Faulty Climate Control A/C Pressure Switch
  • Climate Control A/C Pressure Switch harness is open or shorted
  • Climate Control A/C Pressure 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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