Do you also have codes for all 4 oxygen sensor heaters? If not, this is not likely your problem...

Sent from my SGH-i917 using Board Express

The solution. Here is a photo of the problem cable which was free to rub against the transmission output yoke and driveshaft and short out the O2 heater circuits. The second photo is the fix, a small plastic loop and self tapping screw to secure the cable away from the moving parts. Seems this should have been the original design given all the other O2 cables are so tightly secured everywhere else.

There is only one 30A fuse for the heating circuit for all four sensors. When one sensor heating circuit faults, it knocks out the fuse and all the entire heating circuit for all 4 sensors is out. I got codes for Bank 1 and Bank 2 circuits, and eventually codes of low voltage on the rear sensors on each side. The fix I posted is the fix. Works fine now.

Hi, not sure of the codes but I do have the engine light on,

There are literally 1000's of codes that will cause that. Roll the dice, this might be it...