Conditions for Running the DTC

WARNING: This page is about a different car, the 2007 Isuzu i-370, 2007 GMC Canyon, and 2007 Chevrolet Colorado. However, it is still accessible from the selected car via links, so may be relevant.

The battery voltage is more than 5.23 volts.
DTCs P0641, P0651, P2120, P2125 are not set.
The accelerator pedal is leaving the idle position.
DTC P2138 runs continuously when the above conditions are met.