P2120, P2122, P2123, P2125, P2127, P2128

WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.

The system voltage is greater than 5.23 V.
The ignition is in the Unlock/Accessory or Run position.
DTC P0641 is not set.
DTC P2120, P2122, P2123, P2125, P2127, P2128 runs continuously when the above conditions are met.