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Home >> Buick >> 2006 >> Rainier 4.2 S, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.2L - DTC P0420 To P1682 >> DTC P0641 >> DTC Descriptor

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC P0641 5-Volt Reference 1 Circuit

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