Conditions for Running the DTC

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.

DTC P0667, P0668, or P0669

DTCs P0667, P0716, P0717, P0722, or P0723 are not set.
The TCM internal temperature is between -55°C and +150°C (-67°F and +302°F).
The engine speed is 500 RPM or more for 5 seconds.
The ignition voltage is 8.6V or greater.