[extracrunchie]

Need some advice here, so for the past couple of months I have been reading a p2271 code which is the secondary o2 running rich bank 1 sensor 2.

I have replaced the sensor 3 times(denso, ntk, ngk) each time a difference brand and after 50 km of driving it throws the same code.

I also proceeded to replace spark plugs, fuel injectors, and had a shop check for exhaust leaks.

It seems like a bad back and I can't seem to locate the problem, any ideas?