Mike's Workshop Manuals
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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 P0633: Immobilizer Key Not Programmed
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Conditions for Setting the DTC
Conditions for Setting the DTC
DTC P0633 will set any time the ECM enters learn mode.