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U1844 Code – Battery Energy Control Module Lost Communication With Hybrid/EV Powertrain Control Module On Bus B

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What are the Possible Causes of the Code U1844?
  • Faulty Hybrid/EV Powertrain Control Module
    • Hybrid/EV Powertrain Control Module harness is open or shorted
  • Hybrid/EV Powertrain Control Module 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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