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Cadillac
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2017
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CT6 Plug-In
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Repair and Diagnosis
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Body & Frame
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Ignition Switch/Steering Lock
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Immobilizer System
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Diagnostic Information and Procedures
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DTC P1649: Immobilizer Security Code Not Programmed
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Conditions for Running the DTC
Conditions for Running the DTC
The ECM is in learn mode.