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U012D - Lost Communication With Generator Control Module

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2022 Ford F-550 Super Duty, 2022 Ford F-450 Super Duty, 2022 Ford F-350 Super Duty, 2022 Ford F-250 Super Duty, and 2021 Ford F-550 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
DTC DESCRIPTION U012D - LOST COMMUNICATION WITH GENERATOR CONTROL MODULE

Description: 
Possible Causes: 
Diagnostic Aids:  Refer to the appropriate Electronic Engine Controls article, DTC Charts 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.
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