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bank 2 sensor 1 problem code p0154 showing up.

(2008 Acura TL)
in Missouri City, TX on August 02, 2014
I replaced the bank 2 sensor 1, than my engine light when away the next day it returned. I went with a bosch o2 sensor, does brand matter?Or Do I have a bad sensor? Or do I need to replace the other sensor in front next to the fan as well since they work together please help I dont want to take it to the dealer and pay through the nose for something I can change myself.
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