Conditions for Running the DTC

WARNING: This page is about a different car, the 2006 GMC Yukon XL, 2006 Chevrolet Suburban, and 2006 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

DTCs P0601, P0602, P0606, P2108, U0107 are not set.
The ignition switch is in the crank or run position.
The ignition voltage is more than 5.23 volts.
This diagnostic runs continuously when the above conditions are met.