U1800 Code – Lost Communications With Fuel Injector Control Module

What are the Possible Causes of the Code U1800?
  • Faulty Fuel Injector Control Module (FICM)
  • Fuel Injector Control Module harness is open or shorted
  • Fuel Injector 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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