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.

The ignition is in the Crank or Run position.
The system voltage is more than 5.23 volts.
The communication between the TAC module and the PCM must be valid.
The DTC runs continuously when the above conditions are met.