1999 a6 p0432 p0411

I'm getting both of these codes now.

The right catalytic converter was replaced recently. And actually I
may have been getting these codes even before I replaced the catalytic
converter...but I'm not sure.

Would a bad right oxygen sensor explain both of these codes (as well as
the bad catalytic converter)? I've heard that a vacuum leak might
explain them as well....but I haven't been able to detect one (using the
carb and choke cleaner).

Any help would be greatly appreciated.

Thanks.


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333
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