Will the bank 1 sensor 2 o2 sensor cause my car to bog down and die at 3000 rpms?
No, the sensor won't cause that. All that rear sensor does is monitor the efficiency of the catalytic converter. It only sends that information, the engine computer won't change any operating conditions because of that information, it just lets you know if the cat is working.
If the honeycomb structure inside the cat has broken down, it could be clogging the exhaust and that will shut down the engine. If you can shake it or beat on it and hear rattling, that may be the case. A clogged exhaust will cause very poor running under all conditions, even low rpm's. Have you checked for trouble codes?
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