FixVault

DTC P0A1A: Generator Control Module

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, 2011 Ford Fusion, 2010 Mercury Milan, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
P0A1A - GENERATOR CONTROL MODULE

Description:  This DTC indicates a generator control module (GCM) internal concern.
Possible Causes: 
  • GCM processor concern
  • GCM A/D converter concern
  • GCM supply voltage out of range
  • Transmission control module (TCM)-GCM serial link concern
Diagnostic Aids:  Clear the transaxle control module (TCM) continuous DTCs. Repeat the self-test. If the DTC is present again, install a new transaxle. Refer to the appropriate Automatic Transmission/Transaxle article.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC in table