Mike's Workshop Manuals
: Service manuals for every vehicle
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Cadillac
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2006
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STS V
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System - 4.4L - DTC P0196 To P0496
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DTC P0366 or P0391
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Circuit/System Verification
Circuit/System Verification
If P0366 or P0391 is set, continue with Circuit/System Testing.