RE: 2000 taurus O2 sensor
The first 2 codes are for the heater circuit in the O2 sensors. I would look closely at the wiring to be sure there are no breaks, chafes or bad connections. The 171 could be caused by a vacuum leak, bad MAF, engine misfire, bad fuel, and a lot of other things. Since you stated you are experiencing noise on acceleratrion, I would look closely at the MAF. You need to have the baro read on iot and cross it to the correct altitude. Ford has a problem with them reading wrong. Good luck.