I keep setting a P0153!
"Sorry, let me clarify, and in addition, their respective rear codes. Yes Bank 2 sensor 1 is Passenger front or pre cat sensor."
B2=right/passenger side W/#2 cylinder
S1= pre-cat
S2= post cat
Now for the slow response code, is it possible you have an exhaust leak,even a pin hole?
Ever had to repair the wiring harness besides the extentions?
Can you scan the PCM's data stream is the O2 staying noticably lean or rich?
Another possibility, I used copper gaskets and permatex copper sensor safe RTV to fix the leaks. Could the RTV or copper gaskets have ruined them?
How about anti seize? Is there anything in it that could kill 02's?
It all depends on what kind of compound they are exsposed too.
Most everything automotive now a days says if it is O2 friendly.
If your gonna use somrthing make sure it says this.



