Conditions for Setting the DTC

WARNING: This page is about a different car, the 2007 Pontiac Montana SV6, 2007 Chevrolet Uplander, and 2007 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

The ECM detects an invalid voltage signal on the cruise control set/coast and resume/accelerate switch signal circuit.
The above condition is present for greater than 1.5 seconds.
The PCM/ECM runs this diagnostic every 0.05 seconds.