I recently got some bad gas, which turned my check engine light on my 2002 Ford Taurus SE on. My carmd says I po133 is a ho2s (Oxygen Sensor) Can anyone tell me if this is something I can do myself, and if so, where is this sensor located.
Might first track down and fix the vacuum leak affecting bank#2 (radiator side) for your po174. Clear the codes with scan tool or by disconnecting neg. batt. cable for a few mins. and see if any codes return. Po133 indicates o2 sensor circuit slow response bank#1 (firewall side) sensor#1 (upstream pre-cat o2 sensor).