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U1842 Code – Lost Communication With ECM/PCM

What are the Possible Causes of the Code U1842?
  • Faulty Engine Control Module (ECM)/Powertrain Control Module (PCM)
  • Engine Control Module /Powertrain Control Module harness is open or shorted
  • Engine Control Module /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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