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Home >> Buick >> 2007 >> Lucerne CX >> Repair and Diagnosis >> External Pages >> Different car >> Section 230 (Engine Controls - 3.5L - DTC P0220 To DTC P0455) >> DTC P0401 >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

Operate the vehicle within the Conditions for Running the DTC. Observe the EGR Flow Test Count parameter on the scan tool. EGR Flow Test counts may need to be as many as 16 to pass this DTC after the DTCs have been cleared.

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