Conditions for Running the DTC

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue. However, it is still accessible from the selected car via links, so may be relevant.

Voltage supplied to the module is in the normal operating voltage range (approximately (9 to 16 volts).
Diagnostic trouble codes U1300 and U1301 do not have a current status.
The module operation or vehicle power mode (ignition switch position) requires serial data communication to occur.