Conditions for Setting the DTC
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.
The engine control module (ECM) detects that the actual measured airflow from the MAF, MAP and TP sensors is not within range of the calculated airflow that is derived from the system of models for more than 0.5 second.