Conditions for Setting the DTC

WARNING: This page is about a different car, the 2006 Buick LaCrosse and 2006 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

An open or a short to battery positive voltage or ground on the low reference circuit of the BPPS is present.
A short to ground or an open in the stop lamp switch signal circuit is present.
A short to ground or an open in the 10-volt reference circuit on the BPPS.
A short to ground in the instrument panel (I/P) dimming voltage reference circuit.
A malfunctioning BPPS or BCM.