Well, I got my first code after installing all the goodies to make this car faster. Guess I should have used my own gut instinct and put on defowlers at the first two O2 sensors on each bank after installing the 200 cell cats. Or, does this not matter? I would think the heat would burn them up too much. Waiting on a reply from Velocity AP too.

 

Are you sure it's not just a bad O2 sensor? Might have been old and your cat install disturbed it. No miles or car info so hard to say?
The error code is for the heater section so might be wiring too but I bet on the O2.

If in doubt just swap the O2 sensors side to side and the error should follow if it's a bad O2.
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