Conditions for Running the DTC

WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.

Voltage supplied to the modules is in the normal operating voltage range.
The vehicle power mode master requires serial data communication to occur.
DTC U2100, U0073 or U1000 does not have a current status.