Diagnostic Aids

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

An intermittent malfunction may be caused by a fault in an AIR control/shut-off valve assembly pressure sensor electrical circuits. Inspect the wiring harness and components for an intermittent condition. Refer to Testing for Intermittent Conditions and Poor Connections .
If the DTC cannot be duplicated, the information included in the Freeze Frame data can be useful in determining vehicle operating conditions when the DTC was first set.