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Lol that's exactly what I mean, the conflicting info had been throwing me off

Thanks for the feedback, only one of my sensors is returning high voltage, but the car is at 140k so I'm going to replace all 4.

Hi guys, I've been lurking on this forum for a little while but this is my first time posting! I recently got a 2005 3.7l Liberty. I've done some light maintenance on it and the O2 sensors are next on my list. I've seen some mentions that the upstream and downstream sensor are the same part on...