Probably not, provided the person didn't drench the actual sensor element in PB. Typically, the exterior threads and boss are soaked in PB to faciliate removal. That said, even if you got some on there, it would likely burn off very quickly. O2 sensors are pretty good at cleaning themselves and are also good at alerting you if there is an issue via OBDII codes. No code, no problem.i might have hit a couple of my O2's (bottom side) with over spray from pb blaster while changing my downpipes. can this ruin an O2 sensor?
having fuel trim issues while tuning and wondering if an O2 could be the source of the problem.