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.

The system voltage is 9-18 volts.
The engine speed is greater than 500 RPM for 5 seconds and not in fuel shut off.
The PCM has commanded the 1-2 SS valve ON and OFF.