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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls And Fuel - 2.0L (LTG) - DTC P0010 To DTC P0333 >> Diagnostic Information and Procedures >> DTC P0171 or P0172: Fuel Trim System >> DTC Descriptors

DTC Descriptors

DTC P0171: Fuel Trim System Lean
DTC P0172: Fuel Trim System Rich

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