I was getting the 2196 bank 1 error when warming the car up and when I put the converter in I swapped the front o2's l to r and now I'm getting a 2198 which is bank 2. Soooo, I am replacing the o2's. I would do the same and see what happens. I am kinda excited cause I could swear my car was idling rich and now I may have found the fix.
2007 GT auto, 4.10's, bbk LT's, o/r x, flows, bbk 62mm TB, comp thumpr II's, Camerons 3000 stall, cnl racer CAI, sct bama tunes, seq TL, gt500 strut brace, black on black, black gt500 wheels.
1966 ford f100, 351 cleveland .030, worked CJ heads, Lunati BMII, mighty demon, long tube's, 3" flowmaster 1 chambers, toploader 4-speed.