Conditions for Setting the DTC

WARNING: This page is about a different car, the 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

The commanded state of the output driver module and the actual state of the control circuit do not match.
OR
The ECM detects that the feedback voltage is not within a predicted range when the relay is commanded ON and OFF.
Either condition is present for more than 2 seconds.