Sounds possible (read these similar items in other research), but there are so many other parts mentioned. PCM faliure?
I checked the EGR and it is not stuck; unplugged and replugged the TB connector. Checked various wires for burn or wear since last week I got aggressive on solving an intermittent misfires - everything looks OK. Fuses in underhood fuse box look good. Battery is fully charged/assumed to be good.