actually mcfa has a service bulletin out on this code
it states what kevin said about the fast shifting but it also states that if the shifter gets stuck between neutral and either fwd or rev and it detects an open circuit for more than 2 seconds it will trigger this code. There is also a note about the code being generated if the PDS (Presence Detection System) is activated with the seat switch open.

There are a few other detail about checking the circuits related to the direction control system and also it mentions using diagnozer to clear the code out of the history records in the VCM.