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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Engine Controls And Fuel - 4.6L - DTC P0351 To DTC P2440) >> DTC P0641 or P0651 >> Circuit/System Verification >> P0641

Circuit/System Verification: P0641

WARNING: This page is about a different variant/trim than selected.

Observe the 5-volt reference 1 circuit status parameter with a scan tool. The scan tool should display OK.

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