U1899 Code – Starter/Generator Control Module Lost Communication With Powertrain Control Module

What are the Possible Causes of the Code U1899?
  • Faulty Powertrain Control Module (PCM)
  • Powertrain Control Module harness is open or shorted
  • Powertrain Control Module circuit poor electrical connection
  • Faulty Starter/Generator Control Module (SGCM)
  • 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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