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U1839 Code – Auxiliary Transmission Fluid Pump Control Module Lost Communication With Engine Control Module

What are the Possible Causes of the Code U1839?
  • Faulty Engine Control Module (ECM)
  • Engine Control Module harness is open or shorted
  • Engine 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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