Conditions for Running the DTC

WARNING: This page is about a different car, the 2017 Chevrolet Spark. However, it is still accessible from the selected car via links, so may be relevant.

Ignition On
System Voltage = 9-32 V
{P0601, P0602, P0604, P0606} DTCs run continuously when the above conditions are met.
{P0603} DTC runs at transmission control module power up.