Conditions for Setting the DTC

WARNING: This page is about a different car, the 2003 Buick Regal and 2003 Buick Century. However, it is still accessible from the selected car via links, so may be relevant.

The fault code will set when the fog lamp enable circuit is active and a short to battery voltage is present.
The condition above must be present for more than 0.3 seconds.
If the short to battery voltage is on the output side of the fog lamp switch, the fault will only set when the fog lamp switch is in the ON position.