Conditions for Running 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 time since the last range change is 6 seconds or more.
No output shaft speed rise greater than 250 RPM for 2 seconds.