I currently have a code P014C(O2 sensor Slow Response-Rich to lean Bank 1 Sensor 1) that comes up occasionally. April 2017 while my truck was still under warranty my local dealer "repaired" the same problem that I had at the time but now it's back
with the engine light coming on for a couple of days at a time then clearing then coming back on.
I plan on replacing the sensor but I'm not sure how much that I should spend on it or which brand that I should buy. RockAuto has it anywhere from $42 to $436. and has several different brands to choose from. What brands are good and which ones
shouldn't I bother with? I don't mind spend a couple hundred on it as long as it's worth it.
While we're on the subject I know that there's a service(TSB-25-004-13) bulletin on this. I've read where it calls for the replacement of a section of the wiring harness leading to the O2 sensor because the wiring that was installed at the factory was too
thin. I'm looking at at paperwork from the time that my truck to the dealer in 2017 and I don't see any mention of anything besides them replacing sensor. How do I know if fall under that service bulletin or not?

This is a copy of the paperwork showing the work performed by the dealership in 2017. What would the over lay harness be?