Just an idea, but have you tried removing the superchip and then getting it tested.
Not sure, but I know when doing a diagnostic scan with my diablo chip on, I do get this code.
P0605 Powertrain Control Module (PCM) - Read Only Memory (ROM) test error
1996 2.5LT V6 Contour ATX
My Tour+help/info pics
E0 rims, Gutted Pre-Cats,CTA Custom Exhaust & Intake, Diablo Chip.
