Conditions for Running the DTC

WARNING: This page is about a different car, the 2005 Buick LaCrosse and 2005 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 requires serial data communication to occur.
The DTC U0001 does not have a current status.