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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 P0010 To P0175
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DTC P0171 or P0172
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DTC Descriptor
DTC Descriptor
DTC P0171
Fuel Trim System Lean Bank 1
DTC P0172
Fuel Trim System Rich Bank 1