while cleaning floor about 2 weeks ago, the oxygen sensor green wire was disconnected, so I put it back together and into its slot


i checked the output while driving around and never got above .350 reading on 2v setting digital voltmeter.

does this sound like the o2 sensor needs replaced? I did let car warm up for 10 mins and temp was at 90c but voltage never went above .351 despite lots of flooring on gas pedal.