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 TCM detects IMS Signal C is high, while the gear ratio indicates first, second, third or fourth gear for 8 seconds or more.