Hey Ben,
No mil and no codes from the ecu, but found this on another forum for the same problem:
"turn off codes 532 and 533... they are failing cause of AC missing more than likely and so ECU turns Fans on high to stop overheating
make X - not reported"
Hairy dog:
Low spots on acceleration. Hold in 3rd at 3500, floor it and it just dies for half a second before go. Tuner is going to adjust dynamic fuel.