Conditions for Running the DTC

WARNING: This page is about a different car, the 2007 GMC Sierra and 2007 Chevrolet Silverado. However, it is still accessible from the selected car via links, so may be relevant.

No output, shaft, speed sensor (OSS) DTCs P0722 or P0723.
No AT ISS DTC P0717.
No shift solenoid (SS) DTCs P0757, P0973 or P0974.
The AT ISS speed is 1050 RPM or greater for 2 seconds.
The vehicle speed is greater than 16 km/h (10 mph).
The engine torque is greater than 90 N.m (66 lb ft).
The throttle position is greater than 8 percent.
The engine speed has not changed more than 500 RPM for at least 2 seconds.