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U1803 Code – Lost Communication with Hybrid/EV Powertrain Control Module 2

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What are the Possible Causes of the Code U1803?
  • Faulty Hybrid/EV Powertrain Control Module 2
    • Hybrid/EV Powertrain Control Module 2 harness is open or shorted
  • Hybrid/EV Powertrain Control Module 2 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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