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DTC U012D: Lost Communication With Generator Control Module

U012D - LOST COMMUNICATION WITH GENERATOR CONTROL MODULE

Description: 
Possible Causes: 
Diagnostic Aids:  Refer to the appropriate Electronic Engine Controls article, PCM DTC Chart, to continue diagnosis.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.