Conditions for Setting the DTC

WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.

The air suspension module detects the voltage at the strut position sensor signal circuit is less than 0.5 volt or greater than 4.75 volts for more than 500 milliseconds.
The air suspension module detects that there is a wide differential between the signal voltage ranges of one sensor in comparison to the other over a predetermined period of time.