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Home >> Buick >> 2009 >> Allure Super >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 5.3L - DTC P0420 To DTC P3449 >> DTC P0641 or P0651 >> DTC Descriptors
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DTC Descriptors

DTC P0641

5-Volt Reference 1 Circuit

DTC P0651

5-Volt Reference 2 Circuit