P0051 Bank 2 sensor 1??
Hey, my sentra is throwing P0051 code. Bank 2 sensor 1 o2 sensor fail. So I replaced the expensive o2 sensor and cleared the code. The same code came back on?? I really doubt it's the new o2 sensor and it's not the o2 sensor fuse. I have researched this code and have found that I am not the first with this problem. Is it the ECU? Any help is greatly appreciated.