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Home › Cadillac › 2006 › STS Base, 3.6 7, AWD › Repair and Diagnosis › Engine Performance › System › Engine Control System - 3.6L - DTC P2178 To U0423 › DTC P2187 or P2189 › DTC Descriptors

DTC Descriptors

This diagnostic procedure supports the following DTCs:

DTC P2187 Fuel Trim System Lean at Idle Bank 1
DTC P2189 Fuel Trim System Lean at Idle Bank 2