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Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Hybrid/EV Energy Storage System) >> Diagnostic Information and Procedures >> DTC P0641: 5V Reference 1 Circuit >> Conditions for Setting the DTC

Conditions for Setting the DTC

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Voltage on the 5 V reference circuit 1 is less than 4.39 V or greater than 5.43 V