Mike's Workshop Manuals
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Cadillac
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2006
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STS Base, 3.6 7, AWD
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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 - 3.6L - DTC P2178 To U0423
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DTC P2188 or P2190
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DTC Descriptors
DTC Descriptors
This diagnostic procedure supports the following DTCs:
DTC P2188 Fuel Trim System Rich at Idle Bank 1
DTC P2190 Fuel Trim System Rich at Idle Bank 2