B1865 Code – Battery Power Supply ECU Circuit Open

What are the Possible Causes of the Code B1865?
  • Faulty Battery Power Supply ECU
  • Battery Power Supply ECU harness is open or shorted
  • Battery Power Supply ECU 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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