Been dealing with H02S for several months now. Replaced Sensor 2 on both Banks 1 & 2. Still getting P0161 (Bank 2, Sensor 2). Tested the ground wire at the plug and it is showing slow response, unlike other 3 sensors which switch off and on more rapidly. Watching the computer through buddies scanner problem is intermittent, not constant. We considered the PCM being shorted out, but seems like if that was the case, snesor would be dead all the time, not intermittent.

Any suggestions would be most appreciated! From the posts seems like many have had similar issues, but I haven't found anyone with a solution yet.