Conditions for Running the DTC

WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. 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 of 9 to 16 volts.
Diagnostic trouble codes U1300, U1301 and U1305 do not have a current status.
The vehicle power mode requires serial data communication to occur.